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Add Text A and Text B
Type, paste, or upload a TXT file into each side.
Text Tools
Text Diff
Compare two blocks of text and see exactly what changed.
Paste or upload two versions of a text and instantly see every line that was added, removed, or left unchanged, entirely in your browser. Need to search and replace text instead? Try Find & Replace.
Your text never leaves your device. Comparison happens entirely in your browser.
How it works
Private text comparison in your browser
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Click Compare
See a line-by-line diff with a summary of what was added, removed, and unchanged.
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Copy or download
Copy the diff to your clipboard, or download it as a TXT file.
Use cases
When this comes in handy
Review edits to a document
Compare an earlier draft against a newer one to see exactly what changed.
Check config or data files
Spot line-level changes between two versions of a config, log, or export.
Verify a copy-paste or migration
Confirm that copied or migrated text matches the original, line for line.
FAQ
Common questions
Is my text uploaded anywhere?
No. Both texts are compared entirely in your browser, and nothing is sent anywhere.
Does it compare whole words or characters, or just lines?
Lines. Each line is compared as a whole, so a single-character change makes that whole line show as removed and re-added.
What if the two texts are identical?
You'll see a clear "no differences" message instead of an empty result.
Is there a size limit?
There's no fixed limit, but extremely large and almost entirely different texts (tens of thousands of lines) may take a few seconds or be blocked to avoid freezing your browser.
Can I compare uploaded TXT files?
Yes. Upload a TXT file into either side, and you can still edit it afterward.
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