Diff Checker
Paste two versions of any text and instantly see a line-by-line diff with color-coded additions and deletions. Perfect for comparing code snippets, config files, API responses, and documents. Uses LCS-based diffing — no server, no uploads.
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Common Use Cases
- Compare two versions of a config file
- Spot differences between API responses
- Review text edits before committing
- Compare two code snippets quickly
Frequently Asked Questions
What diff algorithm is used?
The tool uses a Longest Common Subsequence (LCS) algorithm for line-by-line comparison — the same approach used by git diff. It accurately identifies added, removed, and unchanged lines.
Are my texts uploaded to a server?
No. All comparison happens entirely in your browser using JavaScript. Your text never leaves your device.
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Tool Info
CategorytextAI EnhancementNoData StorageZero retention