Text Diff Tool

Compare two texts line by line. Added lines are highlighted green and removed lines red. Useful for comparing config files, logs, and code.

✅ 100% free, no signup, runs entirely in your browser

Text A (before)

Text B (after)

Ignore leading/trailing whitespace

Diff Result

+ 0 added - 0 removed 0 unchanged

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1

Paste text on both sides

Paste the old version on the left and the new version on the right.
2

See the diff

Added lines are highlighted green, removed lines red. Line-by-line comparison.
3

Copy as unified diff

Use Copy to export as Git-style unified diff — useful for code review comments.

Does it support word-level diff?

Line-level only for now. Word-level diff is planned.

Can I ignore whitespace?

Enable "Ignore whitespace" to skip whitespace-only differences.

Is my data sent anywhere?

No. All comparison happens in your browser JavaScript — safe for confidential text.

Any structured diff (JSON/XML)?

Sort JSON keys in our formatter first to normalize order before diffing.