Code Diff
Compare two code snippets and highlight differences.
Original Code
Modified Code
About Code Diff
Code Diff shows a side-by-side or inline comparison of two code snippets with syntax-highlighted additions and deletions. It is useful for reviewing what changed in a function between two versions, comparing your local copy against a reference, or understanding a patch without a full Git setup. The diff is character-level within changed lines for precise change detection.
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Frequently Asked Questions
Is Code Diff free?
Yes, completely free. No signup, no account, no usage limits. Use it as much as you need.
Is my data secure?
All processing happens directly in your browser using JavaScript. Your data is never sent to any server, stored, or shared. It stays entirely on your device.
Does it support syntax highlighting for specific languages?
Yes. You can select the language (JavaScript, Python, CSS, etc.) and the diff view will apply appropriate syntax highlighting to both panels.
Can I ignore whitespace-only changes?
Yes. Enabling "ignore whitespace" mode will skip lines where the only difference is spaces or indentation.