Compare two texts online
Paste two versions of a document, an email or an article and see what changed. Added and removed lines are marked, and changed words are highlighted inside each line.
How to use the text compare tool
- Paste the original text on the left and the changed text on the right.
- The differences appear below straight away.
- Use Previous and Next to step through the changes.
- Turn on Ignore case or Ignore whitespace to hide differences you don't care about.
What you see
- Added, removed and changed lines, colour coded
- Changed words highlighted inside changed lines
- Line numbers for both versions
- Long unchanged passages folded away
About the text compare tool
For documents and writing
Check what an editor changed in your article, compare two versions of a contract clause, or see what an AI rewrite actually did to your paragraph.
Word-level highlights
Line diffs alone make you hunt for the change. Here the changed words inside a line are highlighted, so a single altered number or name jumps out.
Frequently asked questions
- Does it compare by line or by word?
- Both. Lines are matched first, then changed lines are compared word by word and the changed words are highlighted.
- Can I compare Word or PDF documents?
- Copy the text out of them and paste it in. Diff Checker compares plain text.
- Is there a length limit?
- No fixed limit. Texts of several megabytes work because the comparison runs on your device.