Diff checker

Comparison stays in this tab. Nothing is uploaded.

Original

Paste text on both sides.

Compare two texts line by line in this tab. Added and removed lines are marked.

Open Diff checker
Left is the original; right is the revision. Both start empty.
Paste both sides
The unified diff draws under the panes. Tick ignore extra whitespace if spacing is noise.
Copy the diff
Copy the unified diff when you need to paste it into a review.

Can I compare two texts here?

Yes. Paste the original on the left and the new version on the right. The result marks added and removed lines.

Is this a Git diff?

It is a line-level comparison in this tab. It is not connected to Git and does not open files from a repo.

Is the text uploaded?

No. Comparison runs in this tab. Closing it discards both sides.

Can I ignore spaces?

Yes. Ignore spaces collapses extra whitespace before comparing.

Can I copy the result?

Yes. Copy puts a unified +/− listing on the clipboard.