Text Tools / Text Compare
Compare two blocks of text side by side and see exactly what was added, removed, or unchanged — instantly in your browser.
Original
Modified
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Unchanged
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Paste text into both boxes above to see the comparison.
Text Compare highlights exactly what changed between two pieces of text, line by line — added lines in green, removed lines in red, and unchanged lines left plain. It's useful for reviewing edits to an essay or article, comparing two drafts of a cover letter, or spotting changes between versions of any document. Everything runs locally in your browser as you type; neither text is ever sent to a server.
Paste the original text
Put the starting version in the Original box on the left.
Paste the modified text
Put the updated version in the Modified box on the right — the comparison updates instantly.
Review the differences
Added lines are highlighted green, removed lines red, and unchanged lines stay plain. Use Swap to flip which side is which, or Copy diff to grab a plain-text summary.
Line-by-line. If a single line has a small change (like one word edited), that whole line shows as one removed line and one added line rather than highlighting just the changed word.
Very large inputs (extremely long documents compared against each other) are capped to keep the browser responsive — you'll see a clear message if a comparison is too large, with a suggestion to compare smaller sections.
No. The comparison runs entirely locally in your browser. Neither text is uploaded, logged, or stored.