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Text & Code

Text Diff Checker

Compare two texts side by side with highlighting

Compare two blocks of text side by side and see exactly what was added, removed, or changed, highlighted line by line. Use it to review edits between document versions, spot differences in config files, or confirm that two snippets are identical.

Runs 100% in your browser · no upload, no tracking, no ads

How to use Text Diff Checker

  1. Paste the original text into the first panel.
  2. Paste the revised text into the second panel.
  3. Review the highlighted additions and deletions between them.
  4. Adjust either side and the diff recalculates instantly.

Frequently asked questions

Does it do a line-by-line or word-by-word diff?

It highlights changes between the two inputs so you can clearly see inserted and removed content, making version comparisons quick to scan.

Can I compare code as well as prose?

Yes. Any plain text works. Source code, configuration files, logs, or written content all compare the same way.

Is the comparison private?

Completely. Both texts are diffed in your browser and never sent anywhere.

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