Text Diff Checker
Compare two texts and highlight the differences by line, word, or character. Everything is processed in your browser.
Original
Changed
Differences
Enter text in both fields above to see the differences
How to use
- Type or paste your text into the “Original” and “Changed” fields.
- The differences are computed automatically — additions are highlighted in green and deletions in red.
- Switch the comparison unit (lines, words, or characters) and toggle options such as ignoring case or whitespace.
FAQ
Is it free to use?
Yes. All features are free with no usage limits, and no account is required.
Is my text sent to a server?
No. The diff is computed locally in your browser — your text never leaves your device.
What is the difference between line, word, and character modes?
Line mode lists added and removed lines. Word and character modes highlight small changes inline within the text. Switch between them depending on what you are comparing.
What can the JSON diff do?
JSON is automatically formatted before comparison, so differences in indentation or line breaks are ignored. You can also ignore the order of keys.