Code Compare & Diff Checker
Compare two code snippets or text blocks side by side and see a clear difference checker view with green additions and red deletions. Use this free online code compare tool for configs, logs, patches, and reviews — ignore whitespace when needed, and keep everything private in your browser with no file upload.
Runs entirely in your browser. Your data never leaves this device.
- Side-by-side style code compare
- Highlighted additions and deletions
- Online difference checker for text & code
- Ignore whitespace option
- Private — no data leaves your browser
How it works
- Paste original code or text on the left and the changed version on the right for a side-by-side style compare.
- Optionally ignore whitespace so formatting-only noise does not clutter the difference checker view.
- Review highlighted additions (green) and deletions (red) in the unified diff output, then copy what you need.
Key features
- Side-by-side style code compare
- Highlighted additions and deletions
- Online difference checker for text & code
- Ignore whitespace option
- Private — no data leaves your browser
FAQ
Is this a free online code compare tool?
Yes. Use it as a code compare / difference checker for snippets, configs, and logs. Comparison runs entirely in your browser with no upload.
Does it show additions and deletions clearly?
Yes. Added lines are highlighted in green and deleted lines in red in a side-by-side style unified view.
Is this a binary diff?
No — it is a line-based text and code diff powered by the diff library, ideal for source and plain text.
Does ignore whitespace help?
Yes for formatting-only changes when you want to focus on real content differences.
Is data stored?
No. Comparison stays in memory in your tab and never leaves your device.
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