Text Diff Checker

Compare two texts and highlight the differences instantly.

🔒 Secure & Client-Side
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Diff Mode:
0 chars
0 chars

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Frequently Asked Questions

How does the diff checker work?

This tool uses the standard "Myers' diff algorithm" (via the jsdiff library) to find the minimum number of edits required to turn one text into another. It highlights deleted parts in red and added parts in green, making it easy to spot changes.

What is the difference between Chars, Words, and Lines mode?

Chars: Highlights changes letter-by-letter (good for fixing typos).
Words: Highlights changed words (best for editing articles or essays).
Lines: Highlights entire lines that have changed (ideal for code or lists).

Is my data secure? Do you store my text?

Your text is 100% secure. All comparison happens locally in your browser using JavaScript. No data is ever sent to our servers or stored anywhere.