Diff Checker
Compare two texts line by line.
🔒 Processed on your device — nothing is uploaded.
About the Diff Checker
Spotting what changed between two versions of a document or code file by eye is slow. Paste both versions to see added, removed and modified lines highlighted, with word-level changes inside edited lines.
When to use it
- Comparing contract or policy versions
- Reviewing code changes without a Git tool
- Checking edits made to an article or essay
- Finding differences between two configuration files
Tips for the best results
- “Ignore whitespace” hides changes in spacing and indentation
- “Ignore case” treats “Hello” and “hello” as the same
- For very long files, compare the relevant section to keep it fast
How to use the Diff Checker
- Paste your input into the Diff Checker.
- The output is generated instantly in your browser.
- Copy or download the result.
Diff Checker FAQ
Is the Diff Checker free?
Yes. The Diff Checker is completely free with no sign-up, no daily limit and no watermark.
Is it safe to use the Diff Checker with private files?
Yes. The Diff Checker runs entirely inside your web browser, so your files and text are never uploaded to any server.
Does the Diff Checker work on mobile?
Yes. It works in Chrome, Safari, Edge and Firefox on Android, iPhone, Windows and Mac.
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