Text Diff Checker

Compare two text versions and highlight added, removed and changed lines. Everything runs locally in your browser.

Paste two versions to compare them locally.

0 lines, 0 words

0 lines, 0 words

0
Added lines
0
Removed lines
0
Unchanged lines
0%
Changed share

Diff result

Green lines were added. Red lines were removed.
The comparison result appears here.

Private browser comparison

The diff is computed with local JavaScript. Your snippets, drafts and configs are not sent to an upload endpoint.

Useful for code and copy

Compare release notes, prompts, email drafts, config changes and code snippets without opening a desktop diff app.

Line and word highlights

The checker aligns matching lines and marks word changes inside nearby removed and added lines.

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Frequently Asked Questions

Is my text uploaded to Convertr?

No. The diff checker runs entirely in your browser with JavaScript, so pasted text is not uploaded to Convertr servers.

What changes does the text diff checker show?

It compares lines first, then highlights word-level changes inside changed line pairs when possible.

Can I ignore whitespace differences?

Yes. Enable the ignore whitespace option to collapse spacing before comparing lines.