Compare two text versions
Comparison summary
Ready
Added lines use +; removed lines use −.
Unified line diff
Compare two text blocks to see their line-by-line differences.Compare two text versions
Diff Checker compares lines locally in your browser so your source text stays on your device.
1
Add the original
Paste the earlier version of your text into the Original text editor.
2
Add the revision
Paste the new version into the Revised text editor, keeping each line in its intended order.
3
Compare the versions
Select Compare text to review unchanged lines plus additions marked with + and removals marked with −.
Frequently Asked Questions
Is my text uploaded?
No. Comparison happens locally in your browser.
What does a plus mean?
A plus indicates a line that was added in the revised text.
What does a minus mean?
A minus indicates a line found only in the original text.
Does it compare characters?
The checker compares text line by line.
Can I copy the result?
Yes. Use Copy result after comparing the text.
Does it ignore whitespace?
No. Whitespace changes are shown because they change the line.
Is there a sign-up requirement?
No. The tool is free and needs no account.