Compare two texts and see the differences 12 uses
Paste two blocks of text to see every added and removed line highlighted, instantly in your browser.
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- Runs entirely in your browser — your text is never sent to a server
- Line-by-line diff highlights every addition and removal
- Free, no account required
How it works
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1
Paste the text you want to work with.
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2
The result updates live as you type or paste.
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3
Adjust the options to fine-tune the output.
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4
Copy the cleaned-up or compared result.
Why use this tool
Every dev utility, one place
Format, convert, encode, decode, and generate — no more juggling ten tabs.
100% private, always
Every tool runs in your browser — your code and data are never sent anywhere.
Works on any device
Runs on Windows, Mac, Linux, iOS, and Android — nothing to install.
Instant results
No queues, no build step — results update as you type.
Built to handle real data
Full Unicode support and RFC-compliant parsing, edge cases included.
Free, always
Free to use, with no rate limits, sign-up, or trial period.
Frequently asked questions
The engine primarily uses a line-based longest-common-subsequence algorithm, identical to standard Git diffs.
Yes, there is an option to strip leading and trailing spaces to prevent trivial alignment changes from showing up.
The entire old line is highlighted in red as deleted, and the new version immediately follows in green as an addition.
Massive documents (tens of thousands of lines) may cause the browser to hang during the complex calculation.
Yes, it works exceptionally well for code, though it lacks language-specific syntax highlighting.
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