Text Diff Checker

Paste two texts and see exactly what changed, line by line.

Original

Modified

FAQ

How does the diff algorithm work?

This tool uses the Longest Common Subsequence (LCS) algorithm — the same approach used by git diff. It finds the largest set of lines common to both texts, then marks everything else as added or removed.

What is this useful for?

Comparing versions of configuration files, contracts, code snippets, or any text where you need to spot exactly what changed between two versions.

Is my text sent anywhere?

No. All comparison is done in your browser with JavaScript. Your text never leaves your machine.