Text to Binary Converter - Free Online ASCII to Binary Tool

How to Use the Text to Binary Converter

Paste or type the text you want converted to binary (0s and 1s) into the input field.
Adjust any available options shown - the output updates as you type.
The result updates instantly - no submit button required for most operations.
Click Copy or Download to take the output to your next step.

Text to Binary Converter allows you to translate any string into machine-readable code. Paste your text and the tool encodes it to UTF-8 bytes, then formats each byte as an 8-bit binary string. ASCII characters become a single byte (e.g. 'A' = 01000001). Multi-byte UTF-8 characters - accented letters, CJK, emoji - produce 2, 3 or 4 bytes each, all shown sequentially.

How the Binary Code Generator Works

Decoding accepts space-separated or contiguous 8-bit groups and reverses the process via TextDecoder. If the input has malformed binary or invalid UTF-8 sequences, you'll see the Unicode replacement character (U+FFFD) rather than a hard error. This binary to text converter is useful for inspecting raw data or creating encoded messages for technical projects.

UTF-8 encoded - handles every Unicode character
Bidirectional binary to text conversion
Space, newline or no separator options
8 bits per byte, MSB first
Replacement character on invalid binary input

Frequently Asked Questions

Is this 7-bit ASCII or 8-bit UTF-8?

8-bit UTF-8. ASCII characters fit in one byte, but characters outside ASCII (é, 你, 🎉) become 2–4 bytes each, all output as 8-bit groups.

Can I decode binary that has no separator between bytes?

Yes - decoder mode accepts both 'space-separated' and 'contiguous' 8-bit groups. The decoder reads 8 bits at a time.

What happens if my binary input isn't a multiple of 8 bits?

Trailing bits that don't form a full byte are ignored. The decoded output will be missing the corresponding character - a warning is shown.

Why does an emoji produce four bytes?

Emoji are encoded in UTF-8 using 4 bytes (32 bits). Compound emoji like family glyphs use multiple 4-byte sequences joined with zero-width joiners, so they can be 8, 12 or more bytes.

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Text to Binary online

Convert text to binary code and binary back to text