Text Diff Checker
Compare two texts side by side with highlighted additions and deletions.
Runs locally — nothing is uploaded
How to use
- 1
Paste the original text
Enter or paste the baseline version in the Original field on the left.
- 2
Paste the changed text
Enter the revised version in the Changed field. Differences appear automatically below.
- 3
Review highlighted changes
Removed lines appear in red with strikethrough. Added lines appear in green.
Frequently Asked Questions
Yes. When the same line number changes on both sides, added and removed words are highlighted within that line — not just the whole line.
It compares line by line first, which suits code, configs, and multi-line documents. Changed lines also get word-level highlights.
Large texts may slow the browser slightly, but there is no file size limit beyond your device memory.
Red with strikethrough means removed content. Green means added content. Amber means a line changed with mixed word-level edits.
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