Diff Checker

How to use

1. Paste Original text on the left and Modified text on the right (or load the sample).
2. Click Compare — switch Side-by-side / Unified, and toggle word-level or ignore options.
3. Review added/removed stats, then Copy the unified diff or swap/clear panes as needed.

About this tool

Diff Checker runs entirely in your browser on AI Voice Pro Learn. Use it while you follow our AI and developer tutorials - no account, no upload, and no waiting on a remote formatter.

FAQ

Is my text uploaded anywhere?

No. Diffing runs entirely in your browser with a local algorithm. Nothing is sent to our servers.

What is the difference between side-by-side and unified?

Side-by-side shows Original and Modified in two panes with synced scroll. Unified shows a single patch-style view with − / + lines, similar to git diff.

Can I ignore whitespace or case?

Yes. Use Ignore whitespace and Ignore case before comparing when you care about semantic changes only.

Can I copy a patch file?

Yes. Copy unified diff puts a standard two-file patch on your clipboard for pasting into reviews or chats.