Dev
Diff Checker
Compare two texts and highlight differences instantly.
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About this tool
Paste two blocks of JSON, code, or plain text to compare them side by side, highlight added, removed, and changed lines, and copy the diff results. Everything runs locally in your browser.
Frequently asked questions
Can I compare JSON or code?
Yes. Paste JSON, source code, or plain text into the two panels to highlight differences.
Can I copy the comparison results?
Yes. Use the copy action to copy the diff output after comparing.
Is my text uploaded?
No. Comparisons run locally in your browser.