Text Diff Checker
Compare two versions of a document, config file, or code snippet and see exactly what changed — additions in green, removals in red. Compared locally, so confidential text stays private.
Your text never leaves this device — comparison runs entirely in your browser.
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How to use
- Paste the original text on the left and the new version on the right.
- Click Compare.
- Review highlighted line-by-line differences.
Frequently asked questions
What kinds of text can I compare?
Anything: source code, contracts, config files, essays. The tool compares line by line and highlights added, removed, and unchanged lines.
Is my text sent to a server?
No. The diff is computed entirely in your browser, which makes it safe for contracts and other sensitive documents.
Can I compare code files?
Yes. Paste any code — whitespace and indentation are preserved so you can spot even subtle changes.