Online Diff Generator
Online diff generator to compare two texts and highlight additions and deletions. Line or word diff, optional context lines, copyable unified output—runs client-side.
No diff yet. Paste text and click “Generate Diff”.
How to use
Use this diff generator to compare two text blocks.
- Paste the original text on the left and the updated text on the right.
- Select Line (best for code/logs) or Word (best for short prose).
- Optionally hide unchanged content and set context lines.
- Click Generate Diff, then Copy Diff if you want a shareable unified output.
FAQ
Is this online diff generator client-side (no upload)?
Yes. The diff is computed in your browser and the tool does not send your text to a server.
What’s the difference between Line mode and Word mode?
Line mode compares newline-separated lines (best for code/logs). Word mode compares words and spaces to highlight small edits inside sentences.
Can I hide unchanged lines and keep context around changes?
Yes. Enable “Hide unchanged” and set the number of context lines to keep around each change.
Does it generate a Git-style unified diff file?
It outputs a compact unified-style view with +/− prefixes for easy sharing, but it’s not a full patch format with file headers.
Why do I see “(empty line)” in the output?
That label is used to make empty lines visible in Line mode so you can spot added/removed blank lines.
What if my text is very large?
Very large inputs may hit browser limits. Switch to Line mode, hide unchanged lines, or compare smaller sections.
Can I copy the diff output?
Yes. Click “Copy Diff” to copy a plain-text unified output to your clipboard.
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