Grep (Global Regular Expression Print) filters lines of text, keeping only those that match a specified pattern. This tool implements grep with both plain text and regex matching.

What is head and tail?

Head returns the first N lines of a file; tail returns the last N lines. Both are classic Unix commands commonly used to preview log files and data streams.

Text Line Filter - Free Online Grep and Search Tool

Searching Content with the Line Extraction Tool

Paste your data into the input field for search text lines.
Select your preferred mode: Grep, Regex filter, Head, Tail, or Range.
Enter the search pattern or numeric parameters to isolate your data.
Click Filter to view the narrowed results in the output window.

Text Line Filter provides a robust interface to search and filter text lines using industry-standard logic. This free online grep tool allows you to isolate specific information from large datasets, log files, or lists by applying inclusion and exclusion rules. Whether you need to match exact strings or use a complex regex line filter, this utility handles the heavy lifting entirely within your browser, ensuring your data remains private while you refine your results.

Advanced Text Search Utility Functions

This comprehensive text searching tool combines multiple Unix-style utilities into a single browser-based interface. Use the head and tail online functions to preview the beginning or end of your data, or utilize the line range extractor to grab a specific slice of content. The tool's bulk line filter is optimized for performance, allowing you to process large files quickly, making it an essential companion for developers and data analysts who need to search text lines with precision and speed.

Versatile online grep tool supporting both plain text and regular expressions
Head and tail online modes for quick start/end line extraction
Precise line range extractor to isolate specific segments of text
Toggle between including (grep) and excluding (grep -v) matches
Optimized for large bulk line filter operations in the browser

Frequently Asked Questions

What does text-filter do?

text-filter grep, head, tail, and line range extraction.

What input does text-filter accept?

Paste text directly into the input field, or type your data. Most operations handle Unicode, special characters, and multi-line inputs without issue.

How large an input can I process?

There is no hard limit imposed by this tool. Very large inputs (multi-MB text) process within your browser's available memory. For files larger than 50 MB, a command-line tool may be faster.

Can I download the output?

Yes - every output panel includes a Copy to Clipboard button and a Download as file option. Outputs are saved as plain text or the appropriate file format for the operation.

Streamline your data analysis and isolate exactly what you need with this powerful Text Line Filter. Bookmark this text searching tool for the next time you need a fast and reliable online grep tool to search text lines.

Text Line Filter online

Grep, head, tail, and line range extraction - runs in your browser