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Diff Checker
Compare two text blocks and highlight the differences line by line. See additions, removals, and unchanged content at a glance. All processing happens in your browser.
no account
no rate limit
nothing stored
Input
Output
added
removed
unchanged
Both texts are identical.
// how it works
How it works
step 01
Paste
Paste the original text on the left and the modified version on the right.
step 02
Compare
Click compare to run a line-by-line diff using the Longest Common Subsequence algorithm.
step 03
Review
See added lines highlighted in one color and removed lines in another. Unchanged lines show for context.
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