About the Text Diff Checker
The Text Diff Checker compares two versions of text side by side and highlights exactly what was added, removed, or changed. It is invaluable when reviewing edits to a document, spotting differences between two configuration files, or confirming what changed between drafts of an article or piece of code. Paste the original on one side and the revised version on the other to see the differences at a glance.
The comparison is computed entirely in your browser, so the text you compare, which might be confidential or proprietary, is never uploaded. There is no signup and nothing to pay. Instead of squinting line by line to catch a small edit, you get a clear visual breakdown that makes reviewing changes fast and reliable.
How to use it
- 1Paste the original text into the first input area.
- 2Paste the revised text into the second input area.
- 3Run the comparison to highlight the differences.
- 4Review the added, removed, and changed sections.
- 5Edit either side and re-run to compare again.
Key features
- Side-by-side text comparison
- Highlights added and removed content
- Works for prose, code, and config files
- Fast comparison of large blocks of text
- Processed locally for full privacy
Frequently asked questions
- What does the diff actually show me?
- It highlights the parts of the text that differ between the two versions, making additions, deletions, and edits easy to spot.
- Can I compare code as well as plain text?
- Yes. The tool works for any text, including source code, configuration files, and written documents.
- Is my text uploaded to compare it?
- No. The comparison runs in your browser, so the content you paste never leaves your device.
- Is there a limit on how much text I can compare?
- You can compare large blocks of text, limited only by your browser's resources, since there is no server round trip.