// by
free tools for humans who build things
Chunky Munster mascot
All tools Text Numbers & Math Data formats Encoders Hash & Crypto Code & Dev Date & Time Design & Color Converters CSS Security Generators Finance Network SEO Health 📅 Calendars 📷 Social Media
⚲

Chunky Munster is a growing collection of free online developer tools — all running entirely in your browser, with no signup, no tracking, and no data sent to any server. From encoding & decoding (Base64, URL, HTML, Morse code) to cryptographic hashing (SHA-256, MD5, SHA-512, NTLM), data format conversion (JSON, CSV, XML, YAML, TSV) and text utilities (word count, case converters, diff checker, line tools) — everything you need in one fast, private tool hub. No ads. No sign-up walls. Just tools.

// All tools
Encoders
URL Encoder / Decoder
Encode or decode percent-encoded URLs instantly.
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Encoders
Base64 Encoder / Decoder
Convert text or binary data to and from Base64.
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Encoders
HTML Encoder / Decoder
Escape HTML special characters or decode entities back to text.
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Encoders
Morse Code Encoder / Decoder
Translate text to Morse code and back.
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Data formats
JSON Prettifier / Minifier
Format messy JSON or strip it down to one line.
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Data formats
CSV to JSON Converter
Turn a CSV table into clean JSON in one click.
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Hash & crypto
Hash Calculator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes from any text.
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Text
Text Case Converter
Convert text to UPPER, lower, Title, camelCase, snake_case, and more.
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Text
Word & Character Counter
Count words, characters, sentences, and lines. See word frequency.
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Text
Text Diff
Compare two blocks of text and highlight the differences.
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Numbers
Number Base Converter
Convert between binary, octal, decimal, and hexadecimal.
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Numbers
Unix Timestamp Converter
Convert UNIX timestamps to human-readable dates and back.
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Text
Email Extractor
Pull every email address out of any block of text.
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Text
URL Extractor
Extract every URL from any text. Cleans tracking params, dedupes, filters by domain or file type.
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Numbers
Unit Converter
Imperial ↔ Metric. Speed, distance, weight, temperature, volume and area. Type in either field.
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Numbers
Date Calculator
How many days ago was any date? How far away is a future date? Add or subtract days from any date.
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Text
Word of the Day
Discover an unusual, beautiful English word every day — with definition, etymology, pronunciation, and translations.
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Calendar
Space Calendar
Live rocket launch calendar — ISS missions, planetary events, NASA/ESA missions. Grid, timeline and list views. Pulls live data.
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Security
Password Generator
Generate strong, cryptographically random passwords. Set length, toggle character types — nothing sent to any server.
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Generator
QR Code Generator
Generate QR codes for any URL, text, phone, email or WiFi. Download as PNG. Free, no watermark.
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Design
Color Converter
Convert colours between hex, RGB and HSL instantly. Includes a colour picker and live preview.
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Text
Lorem Ipsum Generator
Generate lorem ipsum placeholder text — paragraphs, sentences or words, copy in one click.
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Generator
UUID Generator
Generate v4 UUIDs (Universally Unique Identifiers) — 1 to 50 at a time, copy individually or all at once.
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Converters
Markdown to HTML
Convert Markdown to clean HTML with a live rendered preview. Supports GFM: tables, fenced code, and more.
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Data Formats
JSON to CSV
Convert JSON arrays to CSV for Excel or Google Sheets. Handles nested objects and custom delimiters.
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Developer
Regex Tester
Test and debug regular expressions in real time. Highlights matches, shows groups and indices.
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Developer
JWT Decoder
Decode JWT tokens instantly — see header, payload and expiry. Runs 100% in your browser, nothing sent anywhere.
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Text
Remove Duplicate Lines
Remove duplicate lines from any text or list. Case insensitive mode, trim whitespace, sort output.
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Text
Text Sorter
Sort lines alphabetically A–Z, Z–A, by length, numerically, or shuffle randomly. Works on any list.
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Text
URL Slug Generator
Convert any text to a clean, SEO-friendly URL slug. Custom separator, stop word removal, lowercase.
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Data Formats
XML Formatter
Pretty print or minify XML instantly. Validates structure and reports errors — browser-based, no uploads.
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Data Formats
XML Validator
Validate XML for well-formedness — instant error messages with line & column numbers, document stats, and namespace detection.
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Encoders
Caesar Cipher
Encode or decode text with Caesar cipher. ROT13 preset included. Any shift from 1 to 25.
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Encoders
ROT13 Encoder / Decoder
Encode or decode text with ROT13 or ROT47. The same operation encodes and decodes.
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Encoders
Text to Binary
Convert text to binary code (01001000…) and binary back to text. Supports ASCII and UTF-8.
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Code Tools
HTML Minifier
Strip whitespace and comments from HTML to reduce file size for production.
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Code Tools
CSS Minifier & Prettifier
Compress CSS to shrink file size or prettify CSS for easy editing — two modes in one.
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Code Tools
JavaScript Minifier
Minify JS to shrink file size or beautify compressed scripts for reading and debugging.
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Data Formats
JSON to YAML
Convert JSON to YAML format instantly — useful for Docker, Kubernetes and GitHub Actions configs.
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Data Formats
YAML to JSON
Convert YAML to JSON format instantly — validates syntax and strips comments.
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Text
Text Reverser
Reverse text characters, reverse word order, reverse each word, or flip line order.
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Generators
Random Number Generator
Generate random integers, decimals, or unique number lists using a cryptographically strong source.
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Hash & Crypto
Bcrypt Generator
Hash passwords with bcrypt or verify a password against a bcrypt hash — browser-side, no uploads.
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Data Formats
XML to JSON
Convert XML to JSON format instantly — attributes preserved, browser-side.
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Data Formats
JSON to XML
Convert JSON to well-formed XML — handles arrays, custom root element.
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Data Formats
HTML to Markdown
Convert HTML to clean Markdown — headings, links, tables, code blocks.
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Encoders
Image to Base64
Encode PNG, JPG, GIF or SVG as a Base64 data URI for embedding in HTML or CSS.
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Encoders
URL Parser
Break any URL into protocol, host, path, query parameters and fragment.
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Numbers
Numbers to Words
Convert any number to its English word form — cardinal or ordinal.
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Encoders
Text to Hex
Convert text to hexadecimal and hex back to text — UTF-8 aware.
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Generators
Random String Generator
Generate cryptographically random strings, tokens and API keys.
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Text
Word Frequency Counter
Count and rank word frequencies in any text — stop words, CSV export.
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Text
Add Line Numbers
Add customisable line numbers to any text — start number, padding, separator.
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Encoders
Base32 Encoder / Decoder
Encode or decode Base32 strings — RFC 4648, used in TOTP 2FA secrets.
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Data Formats
JSON Validator
Validate JSON syntax, pinpoint errors by line, format or minify.
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Text
Remove Empty Lines
Strip all blank and empty lines from text — with whitespace and reduction options.
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Data Formats
HTML to Text
Strip HTML tags and extract clean plain text — entities decoded, structure preserved.
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Text
Letter Frequency Counter
Count and chart letter frequencies in any text — useful for cryptanalysis.
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Text
Whitespace Cleaner
Trim, collapse and fix whitespace — leading spaces, double spaces, tabs.
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Data Formats
CSV ↔ TSV Converter
Convert CSV to tab-separated and back — handles quoted fields correctly.
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Numbers
Scientific Notation
Convert numbers to scientific notation and back — E notation and × 10ⁿ format.
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Numbers
Roman Numeral Converter
Convert numbers to Roman numerals and back — supports 1 to 3,999,999.
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Text
Text Repeater
Repeat any text or string multiple times — custom separator and numbering.
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Data Formats
JSON String Escaper
Escape or unescape special characters in JSON strings instantly.
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Data Formats
JSON to TSV
Convert a JSON array of objects to tab-separated values.
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Data Formats
TSV to JSON
Convert tab-separated values to a JSON array with header-based keys.
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Data Formats
YAML to CSV
Convert YAML sequences (arrays) to CSV format instantly.
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Data Formats
CSV to YAML
Convert CSV data to YAML format — first row becomes keys.
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Data Formats
XML to CSV
Convert XML records to CSV — child elements become columns.
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Numbers
Seconds to H:M:S
Convert seconds to hours, minutes and seconds — and back.
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Numbers
IP Address Converter
Convert IPv4 addresses to binary, hex, decimal and octal.
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Code
HTML Prettifier
Format and indent HTML with consistent spacing — readable source code.
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Code
CSS Prettifier
Format and beautify CSS — or minify it for production.
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Code
JS Prettifier
Prettify or minify JavaScript code — uses the same engine as your code editor.
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Code
JS Validator
Check JavaScript syntax for errors — reports line and column numbers.
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Code
XML Minifier
Strip whitespace and comments from XML to reduce file size.
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Data Formats
JSON Minifier
Minify JSON to strip all whitespace — compact output for APIs.
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Numbers
Number Base Converter (Multi)
Convert between binary, octal, decimal, hex, base 32 and base 64 simultaneously.
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Data Formats
CSV to XML
Convert CSV data to XML format — custom root and row element names.
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Data Formats
JSON to Text
Flatten JSON to readable key-value plain text with dot notation.
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Data Formats
TSV to CSV
Convert tab-separated values to CSV — handles quoted fields.
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Encoders
Text to HTML Entities
Convert text characters to HTML entity codes — encode all or just unsafe chars.
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Hash & Crypto
All Hashes Calculator
Generate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 all at once.
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Hash & Crypto
MySQL Password Hash
Generate a MySQL PASSWORD() hash — double SHA-1, browser-side.
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Encoders
HTML Decoder
Decode HTML entities back to plain text — all named and numeric entities.
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Encoders
URL Decoder
Decode URL percent-encoded strings to plain text instantly.
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Encoders
URL Encoder
Encode text to URL-safe percent-encoded format — component or full URI.
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Encoders
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to plain text.
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Data Formats
XML to YAML
Convert XML documents to YAML format — browser-side.
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Data Formats
YAML to XML
Convert YAML to XML format — browser-side, no upload.
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Data Formats
CSV Transposer
Swap rows and columns in a CSV table — like TRANSPOSE in Excel.
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Data Formats
CSV Column Tools
Extract, delete, swap or reorder columns in a CSV.
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Data Formats
CSV Delimiter Changer
Change the delimiter of any delimited text file — comma, semicolon, pipe, tab.
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Data Formats
XML to TSV
Convert XML records to TSV (tab-separated values).
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Text
Text Columns Converter
Split text columns by delimiter and output as CSV or TSV.
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Numbers
Binary to Decimal
Convert binary to decimal, hex and octal — or any base to any other.
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Design
Color Picker
Pick and convert colors between HEX, RGB, HSL and HSV instantly.
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Data Formats
JSON to CSV (Download)
Convert JSON array to CSV with one-click download.
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Data Formats
YAML to TSV
Convert YAML sequences to TSV (tab-separated values) format.
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Data Formats
TSV to XML
Convert tab-separated values to XML with custom element names.
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Data Formats
XML to Text
Strip XML tags and extract plain text content from any XML.
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Code
BBCode to HTML
Convert BBCode forum markup to HTML — with live preview.
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Text
BBCode to Text
Strip all BBCode tags and extract plain text from forum posts.
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Hash & Crypto
NTLM Hash Calculator
Generate the NTLM hash (MD4 of UTF-16LE) for any string.
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Hash & Crypto
MD5 Hash Calculator
Generate the MD5 hash of any text string — live as you type.
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Hash & Crypto
SHA-256 Hash Calculator
Generate the SHA-256 hash of any text — uses Web Crypto API.
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Hash & Crypto
SHA-1 Hash Calculator
Generate the SHA-1 hash of any text — browser-side, no upload.
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Hash & Crypto
SHA-512 Hash Calculator
Generate the SHA-512 hash of any text — 128 hex characters.
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Hash & Crypto
SHA-384 Hash Calculator
Generate the SHA-384 hash of any text — truncated SHA-512.
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Hash & Crypto
SHA-224 Hash Calculator
Generate the SHA-224 hash of any text — truncated SHA-256.
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Text
Number Extractor
Extract all numbers from any block of text — integers, decimals, negatives.
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Encoders
Text to Octal
Convert text to octal codes — and octal back to readable text.
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Encoders
Text to Decimal
Convert text to decimal code points — and decimal back to text.
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Encoders
Punycode Encoder / Decoder
Encode international domain names to Punycode and decode back.
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Encoders
Base58 Encoder / Decoder
Encode and decode Base58 — the encoding used by Bitcoin and IPFS.
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Hash & Crypto
XOR Encryptor / Decryptor
Encrypt and decrypt text using XOR cipher — same key both ways.
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Text
Text Grep
Filter text lines by pattern — like grep in your browser. Supports regex.
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Text
Text Head / Tail
Extract the first or last N lines — like Unix head and tail.
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Text
Line Range Extractor
Extract a specific range of lines by start and end line number.
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Text
Add Line Prefix / Suffix
Add a custom prefix and/or suffix to every line of text.
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Text
Spaces to Tabs Converter
Convert spaces to tabs or tabs to spaces — set your indent size.
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Numbers
Random IP Generator
Generate random IPv4 addresses — public, private, or custom range.
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Numbers
Random MAC Generator
Generate random MAC addresses — choose format and count.
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Numbers
Random Date Generator
Generate random dates within any range — ISO, locale, or Unix format.
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Numbers
Prime Number Generator
List all prime numbers up to any limit using the Sieve of Eratosthenes.
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Numbers
Fibonacci Generator
Generate the Fibonacci sequence — first N terms or up to a limit.
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Text
Truncate Text Lines
Trim every line to a maximum character length with optional ellipsis.
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Text
Find Longest / Shortest Line
Find the longest and shortest lines in any text — with line numbers.
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Text
Word Splitter
Split text by any delimiter and put each token on its own line.
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Text
Word Wrapper
Wrap text to a column width — like Unix fmt or fold.
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Text
Center / Right-Align Text
Center or right-align text lines within a column width.
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Text
Text Line Joiner
Join multiple lines into a single line with a custom separator.
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Text
List Operations
Union, intersection, or difference of two lists — one item per line.
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Text
Text Statistics
Full text analysis — chars, words, reading time, unique words and more.
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Text
Text Randomizer
Randomly shuffle lines or characters in any block of text.
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Calculator
Percentage Calculator
Calculate percentages, percentage change, and more — three modes.
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Calculator
Age Calculator
Calculate exact age in years, months, and days from any birthdate.
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Health
BMI Calculator
Calculate Body Mass Index from height and weight — metric or imperial.
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Calculator
Tip Calculator
Calculate tip amount and split the bill between any number of people.
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Calculator
Discount Calculator
Calculate sale price after discount, or find what % off you got.
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Finance
VAT Calculator
Add or remove UK VAT (20%) — works with any VAT rate.
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Finance
Compound Interest
Calculate compound interest and final investment balance over time.
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Finance
Mortgage Calculator
Calculate monthly mortgage payments and total repayment cost.
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Math
GCD & LCM Calculator
Calculate the GCD and LCM of two or more numbers instantly.
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Math
Factorial Calculator
Calculate n! — shows the full expansion for small values.
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Math
Prime Number Checker
Check if any number is prime or composite — shows smallest factor.
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Math
Quadratic Solver
Solve ax²+bx+c=0 with real and complex roots — step-by-step.
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Time
Stopwatch
Online stopwatch with lap recording — millisecond precision.
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Time
Countdown Timer
Countdown timer with alarm — presets include Pomodoro (25 min).
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CSS
Box Shadow Generator
Generate CSS box-shadow with live visual preview — copy instantly.
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CSS
CSS Gradient Generator
Generate CSS linear-gradient with live preview — copy the code.
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CSS
Border Radius Generator
Generate CSS border-radius — control all four corners independently.
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CSS
Text Shadow Generator
Generate CSS text-shadow effects with live preview.
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Developer
Cron Expression Builder
Build cron expressions visually and get plain-English explanations.
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HTML
HTML Table Generator
Build HTML tables visually and copy the code instantly.
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SEO
SEO Ranking Wizard
6-stage SEO checklist — keyword placement, on-page, technical, off-page, local & content. Live scoring, localStorage saves.
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SEO
Blog Post Creator
Generate a complete blog structure for any keyword — titles, headings, meta, intro, FAQ, conclusion, LSI terms, and a full AI writing prompt for ChatGPT / Claude.
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SEO
Meta Tag Generator
Generate SEO meta tags and Open Graph tags for any webpage.
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Security
Vigenère Cipher
Encrypt and decrypt text with the Vigenère polyalphabetic cipher.
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Developer
Bitwise Calculator
Calculate AND, OR, XOR, NOT, and shift operations with binary view.
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Design
Color Palette Generator
Generate complementary, triadic, and monochromatic colour palettes.
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Design
Random Color Generator
Generate random colours with hex, RGB, and HSL formats — copy instantly.
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Math
Statistics Calculator
Calculate mean, median, mode, std dev, variance, and range from any dataset.
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Text
Palindrome Checker
Check if any word or phrase reads the same forwards and backwards.
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Text
Anagram Checker
Check whether two words or phrases are anagrams of each other.
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Converter
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin instantly.
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Converter
Data Storage Converter
Convert between bytes, KB, MB, GB, TB, and binary units (KiB, MiB…).
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Converter
Speed Converter
Convert between mph, km/h, m/s, knots, and Mach number.
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Converter
Angle Converter
Convert between degrees, radians, gradians, turns, and more.
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Time
Pomodoro Timer
25-minute Pomodoro focus timer with short and long break modes.
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Network
Subnet Calculator
Calculate subnet info from any IP/CIDR — network, broadcast, and hosts.
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Security
Password Strength
Check password strength — entropy, estimated crack time, and tips.
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Reference
ASCII Table
Complete ASCII character reference — decimal, hex, octal, and binary for all 128 chars.
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Developer
HTTP Status Codes
Complete reference for all HTTP status codes — 1xx through 5xx explained.
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Design
Color Mixer
Blend two colours at any ratio — see hex, RGB, and HSL output live.
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Design
Hex Colour Picker
Pick any colour and get the hex, RGB, HSL, and HSV values instantly.
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Math
Number Inspector
Inspect any integer — factors, prime check, binary, hex, and more.
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Skills
Typing Speed Test
Test your typing speed in WPM and accuracy — 60-second test.
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Text
Character Counter
Count characters, words, lines, sentences, and paragraphs instantly.
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Finance
Currency Converter
Convert between major world currencies with offline reference rates.
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Finance
Loan Calculator
Calculate monthly loan payments, total interest, and repayment cost.
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Health
Calorie Calculator
Calculate your TDEE and daily calorie needs using the Mifflin-St Jeor formula.
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Time
Days Until
Count the days, hours, and minutes until any future date or event.
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Developer
Markdown to HTML
Convert Markdown to HTML with live preview — browser-based.
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Developer
JSON to CSV
Convert a JSON array of objects to CSV format with custom separator.
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Developer
XML to JSON
Convert XML to JSON format instantly — all processing in your browser.
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Developer
SQL Formatter
Format and beautify SQL queries with keyword capitalization.
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Text
Lorem Ipsum Generator
Generate lorem ipsum placeholder text — paragraphs, sentences, or words.
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Text
Text Repeater
Repeat any text a specified number of times with a custom separator.
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Text
Case Converter
Convert text between camelCase, snake_case, PascalCase, kebab-case, and more.
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Developer
UUID v4 Generator
Generate random UUID v4 identifiers — single or bulk export.
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Converter
Binary to Text
Convert binary code to text and text to binary — both directions.
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Converter
Hex to Text
Convert hexadecimal code to text and text to hex — both directions.
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Developer
JSONPath Tester
Test JSONPath expressions against JSON data with live results.
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Text
Number to Words
Convert any number to written English words — up to trillions.
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Developer
Regex Tester
Test regular expressions with live match highlighting and group capture.
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Developer
URL Parser
Parse any URL into protocol, host, path, query parameters, and hash.
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Network
IP Address Info
Get class, binary, hex, and info for any IPv4 address.
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Time
Epoch Converter
Convert Unix timestamps to human-readable dates and dates to epoch.
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Design
Color Contrast Checker
Check colour contrast ratio for WCAG AA and AAA accessibility compliance.
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SEO
Text to Slug
Convert any text to a clean, SEO-friendly URL slug with optional stop word removal.
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CSS
PX to REM Converter
Convert pixel values to rem units and rem to px for responsive CSS.
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Time
Age Calculator
Calculate your exact age in years, months, days, hours, and minutes.
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Math
Percentage Calculator
Calculate percentages, increases, decreases, and percentage change.
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Health
BMI Calculator
Calculate your Body Mass Index in metric or imperial units.
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Math
Random Number Generator
Generate random integers between any min and max value — single or bulk.
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Design
Color Palette Generator
Generate complementary, triadic, and analogous colour palettes from any base colour.
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Time
Countdown Timer
Set a custom countdown timer with an audio alert — free, no signup.
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Time
World Clock
Live analog & digital clocks for any city in the world — 3×3 grid, fully customisable.
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Text
ASCII Art Generator
Convert text into ASCII art banners using classic block fonts.
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Text
Word Frequency Counter
Count how often each word appears in any text — frequency analysis.
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Security
Password Strength Checker
Check password strength — entropy, crack time estimate, and improvement tips.
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Time
Timezone Converter
Convert times between world time zones — free, browser-based.
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Finance
Tip Calculator
Calculate tip amount and split the bill between any number of people.
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Design
Aspect Ratio Calculator
Scale any resolution while maintaining its aspect ratio.
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Time
Stopwatch
Measure elapsed time with lap recording — free browser stopwatch.
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Text
Text Diff
Compare two pieces of text and highlight the additions and removals.
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Network
CIDR Calculator
Calculate subnet details from CIDR notation — network, broadcast, host range.
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Converter
Morse Code Translator
Translate text to Morse code and decode Morse code to text — with audio playback.
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Math
Speed Calculator
Calculate speed, distance, or time — enter any two to find the third.
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Finance
Compound Interest Calculator
Calculate compound interest growth with a year-by-year breakdown.
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Design
HSL to RGB Converter
Convert between HSL, RGB, hex, and HSV colour formats.
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Developer
HTML Entity Encoder
Encode text to HTML entities and decode HTML entities back to text.
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SEO
Batch Slug Generator
Generate URL slugs for multiple titles at once — bulk processing.
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Developer
HTML Minifier
Minify HTML by removing whitespace and comments — browser-based.
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Text
List Sorter
Sort, shuffle, deduplicate, or reverse any list — free, instant.
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Text
Word Wrap
Wrap text to any column width for terminals, code, and documents.
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Math
Number Base Converter
Convert numbers between binary, decimal, hexadecimal, and octal.
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Math
Random Number Chooser
Pick random numbers in any range — no repeats, even/odd filter, bulk generate.
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Text
Random Word Chooser
Pick random words by difficulty (easy/medium/hard), length, and quantity.
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Random
Name Chooser
Randomly pick names for raffles, competitions, and prize draws — with spin animation.
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Design
Aspect Ratio Resizer
Keep the correct aspect ratio when resizing images or videos.
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Math
Average Calculator
Calculate mean, median, mode, range, and standard deviation from any list of numbers.
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Health
BMR Calculator
Calculate your Basal Metabolic Rate (BMR) and daily calorie needs.
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Health
Body Fat Calculator
Estimate your body fat percentage using the US Navy method.
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Random
Coin Flip
Flip a virtual coin online — instant heads or tails result.
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Design
Colour Name Finder
Find the closest CSS colour name for any hex or RGB colour.
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Converter
Cooking Converter
Convert between cooking measurements: cups, tablespoons, ml, grams, ounces.
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Random
Dice Roller
Roll virtual dice — D4, D6, D8, D10, D12, D20 and custom sides.
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CSS
Font Size Converter
Convert font sizes between px, rem, em, pt, and vw with live preview.
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Math
Fraction Calculator
Add, subtract, multiply and divide fractions — auto simplified to lowest terms.
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Finance
Fuel Cost Calculator
Calculate how much fuel a road trip will cost — supports UK, US, and EU modes.
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Math
Grade Calculator
Calculate your overall grade from multiple weighted assignments.
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Random
Magic 8-Ball
Ask the Magic 8-Ball any yes/no question and get a classic answer.
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Finance
Meeting Cost Calculator
Calculate the real cost of a meeting based on attendees and salary.
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Math
Percentage Change Calculator
Calculate percentage increase or decrease between two values.
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Converter
Pixel to CM Converter
Convert pixels to centimetres and centimetres to pixels — choose your DPI.
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Random
Random Quote Generator
Generate random inspirational, motivational, and philosophical quotes.
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Text
Reading Time Calculator
Paste text and calculate how long it takes to read at your pace.
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Finance
ROI Calculator
Calculate your return on investment (ROI) as a percentage.
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Health
Sleep Calculator
Find the best time to wake up or go to sleep based on sleep cycles.
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Text
Speaking Time Calculator
Calculate how long it will take to deliver a speech or presentation.
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Finance
Split Bill Calculator
Split a restaurant bill equally between any number of people.
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Time
Time Duration Calculator
Add or subtract hours and minutes — calculate time between two times.
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Math
Wind Chill Calculator
Calculate the wind chill factor and real-feel temperature.
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Encode
ASCII85 Encoder
Encode and decode ASCII85 (Base85) — a compact binary-to-text encoding.
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Number
Gray Code Converter
Convert binary to Gray code and Gray code back to binary instantly.
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Number
BCD Converter
Convert decimal numbers to Binary Coded Decimal (BCD) and back.
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Time
Seconds Converter
Convert seconds to HH:MM:SS or human-readable time — and back.
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Number
Number Rounder
Round numbers to decimal places, significant figures, or nearest integer.
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Encode
IDN / Punycode Encoder
Encode Unicode domain names to Punycode (IDN) and decode back.
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Encode
UTF Encoder / Decoder
Encode and decode text in UTF-8, UTF-16, and UTF-32 byte representations.
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Encode
UUencode / UUdecode
Encode and decode UUencoded text — the classic Unix binary-to-text format.
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Network
Binary to IP Address
Convert IPv4 addresses between binary (32-bit) and dotted decimal notation.
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Network
IP Address Sorter
Sort a list of IPv4 addresses in numerical order and deduplicate them.
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Network
What Is My IP?
See your public IP address (IPv4 and IPv6) and basic network info.
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Color
CMYK Converter
Convert colors between CMYK, RGB, HSL, and HEX — for print and web.
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Hash
MariaDB Password Hash
Generate MariaDB / MySQL password hashes from a plaintext password.
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Hash
PostgreSQL Password Hash
Generate PostgreSQL MD5 or SCRAM-SHA-256 password hashes.
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Crypto
AES Cipher
Encrypt and decrypt text with AES-128 or AES-256 (GCM/CBC) in your browser.
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Crypto
DES Cipher
Encrypt and decrypt text using the classic DES cipher algorithm.
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Crypto
RC4 Cipher
Encrypt and decrypt text with the RC4 (ARC4) stream cipher.
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Crypto
Rabbit Cipher
Encrypt and decrypt text using the Rabbit stream cipher (RFC 4503).
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Text
Generate Text from Regex
Generate random strings that match any regular expression pattern.
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Random
Random Data Generator
Generate random names, addresses, emails, dates, phones, and companies.
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Image
Image Converter
Convert PNG, JPG, WebP and more — resize and change format in your browser.
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Location
UK Postcode Finder
Look up any UK postcode — area, ward, county, lat/lng and more.
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Telecom
UK Phone Lookup
Identify the area and type of any UK phone number from its area code.
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Social Media
Instagram Puzzle Maker
Split any image into a perfect Instagram grid puzzle. Download numbered pieces and post in reverse order for a seamless feed.
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Social Media
Social Image Resizer & Dimensions Guide
Exact 2026 image dimensions for every major platform plus a one-click browser resizer with crop, letterbox, and stretch modes.
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Encode
File to Base64
Convert any file to a Base64 string or data URI — fully browser-side.
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Text
Backslash Escape Tools
Escape and unescape backslash sequences in strings, JSON, and file paths.
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Hash
Bcrypt / Scrypt Hash
Generate and verify bcrypt and scrypt password hashes in the browser.
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Color
Color Palette Generator
Generate harmonious color palettes — shades, tints, complementary, and analogous.
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CSS
CSS Gradient Generator
Build CSS linear, radial, and conic gradients visually — copy the code.
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Text
Delimited Column Tools
Extract, reorder, or transform columns from delimited text (CSV, TSV, pipe).
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Text
Diff Checker
Compare two blocks of text and highlight the differences line by line.
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Code
HTML Formatter
Beautify or minify HTML code — indent, tidy, and format instantly.
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Network
IP Address Lookup
Look up geolocation, ISP, and hostname information for any IP address.
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Text
Line Cleaner
Remove blank lines, trim whitespace, and clean up messy text blocks.
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Text
List Set Tools
Perform union, intersection, and difference operations on two text lists.
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Number
Math Constants
Reference table of important mathematical constants — π, e, φ, √2 and more.
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Code
Printf Formatter
Preview printf / sprintf format strings with real values instantly.
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Random
Random Data (Batch)
Generate batches of random numbers, strings, UUIDs, and more in one click.
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Text
Regex Tools
Test, extract, and replace using regular expressions — with match highlighting.
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Text
String Length Counter
Count characters, bytes (UTF-8), words, and lines in any string.
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Text
String Splitter
Split a string by any delimiter or chunk size — output as list or JSON.
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Text
Text Cleaner
Fix smart quotes, dashes, whitespace, and unicode issues in pasted text.
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Text
Text Filter
Keep or remove lines containing a keyword or matching a regex pattern.
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Text
Text Line Tools
Reverse, sort, number, prefix, suffix, and join lines of text.
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Text
Text Pad
Pad strings left, right, or center to a fixed width with any character.
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Number
Thousands Separator
Add or remove thousands separators from numbers in any locale format.
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Text
TSV Column Tools
Extract, reorder, or transform columns from tab-separated value files.
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Text
Whitespace Converter
Convert between spaces and tabs, collapse whitespace, and normalise indentation.
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// Why Developers Use Chunky Munster

Chunky Munster is a free, browser-only hub of 240+ developer and utility tools — built for speed, privacy, and zero friction. There's no account to create, no extensions to install, no data sent to any server. Every tool runs entirely in your browser using JavaScript, so your code, text, files, and sensitive data never leave your device. Whether you need to encode a Base64 string in 2 seconds or format a wall of minified JSON at 2am, Chunky Munster is always open, always free, and always instant.

// 240+ free tools

A constantly growing toolkit covering encoding, hashing, formatting, conversion, generation, design, SEO, finance, health, and more — all in one place.

// Zero server processing

Every tool is 100% client-side. Your data is processed in your browser tab and never transmitted, stored, or logged anywhere.

// No sign-up, no tracking

No accounts. No cookies. No analytics that follow you around. Just open a tool, use it, and close the tab.

// Works offline

Once the page loads, most tools work without an active internet connection — useful in restricted environments or on slow networks.

// Instant results

No server round-trips means no waiting. Results appear as you type with near-zero latency on all modern devices and browsers.

// Open forever

No subscription walls, no premium tiers, no "free trials." Every tool listed here is free to use as many times as you need.

// What Tools Are Available?

Chunky Munster groups its 240+ tools into categories so you can find what you need fast. Use the search bar or category filters above to jump directly to a tool, or browse the full breakdown below.

Encoding & Decoding Base64, URL encode/decode, HTML entities, Morse code, ROT13, binary, hex, Punycode, JWT decoder, ASCII, Unicode
Hashing & Crypto MD5, SHA-1, SHA-256, SHA-512, NTLM, bcrypt, HMAC, CRC32, Adler-32, password strength checker
Data Format Conversion JSON ↔ CSV, JSON ↔ XML, JSON ↔ YAML, JSON ↔ TOML, CSV ↔ TSV, JSON formatter, XML formatter, YAML validator
Text Utilities Word count, char count, case converters, line sorter, duplicate remover, diff checker, text reverser, whitespace tools
Generators UUID, Lorem Ipsum, random number, strong password, QR code, barcode, test data, random name, credit card tester
Numbers & Math Scientific calculator, percentage calc, base converter (bin/oct/dec/hex), Roman numerals, prime checker, statistics
Date & Time Epoch/Unix converter, date diff calculator, age calculator, time zone converter, world clock, countdown timer
Color & Design HEX ↔ RGB ↔ HSL converter, color picker, gradient generator, contrast checker, palette from image, tint & shade
CSS & HTML CSS minifier, CSS formatter, CSS gradient tool, border radius generator, box shadow builder, HTML minifier, entity encoder
Network & IP IP lookup, CIDR calculator, DNS lookup, HTTP header viewer, user-agent parser, MAC address lookup, ping tool
SEO Tools Meta tag generator, text to slug, batch slug generator, keyword density, Open Graph preview, robots.txt generator
Finance & Unit Converters Loan repayment, compound interest, VAT calculator, currency formatter, length, weight, temperature, speed converters
Health & Fitness BMI calculator, BMR & TDEE estimator, body fat %, calorie counter, macro calculator, ideal weight, water intake
Code & Dev Regex tester, JSON path evaluator, SQL formatter, cron expression parser, diff checker, Markdown previewer, JWT decoder
Fun & Random Coin flip, dice roller, random colour, 8-ball, random fact generator, would-you-rather, decision spinner

// Who Uses Chunky Munster?

Chunky Munster is designed for anyone who touches a computer — but especially:

// Built for Privacy — By Design

Unlike most "free online tool" sites that run your input through their servers (logging it, training on it, or selling it), Chunky Munster processes everything locally. When you paste a password into the hash tool, that password string never leaves your browser. When you upload a file for conversion, the file never touches a remote server. There is no backend. There are no API calls. There is no database storing your queries. The architecture is intentionally simple: static HTML, vanilla JavaScript, and your browser's built-in Web APIs. That's it.

You can verify this yourself by opening the browser's network tab while using any tool — you'll see exactly zero outbound requests carrying your data.

// Frequently Asked Questions

Are all Chunky Munster tools completely free?

Yes — every tool is 100% free with no hidden costs, no accounts, and no usage limits. We believe developer utilities should be accessible to everyone.

Do these tools send my data to a server?

No. Every tool runs entirely in your browser using JavaScript. Your text, files, and data never leave your device — making Chunky Munster safe to use with sensitive or private information.

What kinds of tools does Chunky Munster offer?

Encoders and decoders (Base64, URL, HTML, Morse, Punycode, Base58), hash generators (MD5, SHA-1, SHA-256, SHA-512, NTLM), data format converters (JSON, CSV, XML, YAML, TSV), text utilities (case conversion, word count, diff checker, line tools), number tools, random generators — and hundreds more actively in development.

How is Chunky Munster different from other online tool sites?

Everything runs client-side — your data is never uploaded. No ads disrupting your workflow, no sign-up walls, and each tool is built for speed and keyboard-friendly use.

Can I suggest a new tool?

Absolutely — click the "Suggest a change" button on any tool page to send your idea directly to our team. We're actively building hundreds more tools and love hearing what users need.

Does Chunky Munster have a Facebook page?

Yes! Follow us on Facebook for updates, new tool announcements, and community discussion: facebook.com/ChunkyMunsterApps

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