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Use the labelled fields in the workspace above. If example values are provided, try them first or replace them with your own.
Writing & content · Free online tool
Text diff checker
Compare two versions of text and highlight additions, removals and unchanged lines.
3 guest runs per rolling 24 hours10 with a free accountPrivate inputsMobile-friendly
Text diff checker workspace
Runs locally in your browser
Result
Change summary—
Line-by-line diff
Use it with confidence
How to use the text diff checker.
Calculate and review
Use the main action when needed. A local sequence comparison aligns matching lines and labels the remaining additions and deletions.
Try a worked example
Paste an earlier and revised draft to review changed lines before approving copy.
Check the assumptions
Very large files or moved paragraphs may be clearer in a dedicated version-control diff.
Helpful answers
Text diff checker FAQs.
Is the text diff checker free?
Yes. Guests receive 3 runs per rolling 24 hours, verified free accounts receive 10, and Premium subscribers receive unlimited normal use.
Does UtilHub upload or save my inputs?
No. This tool runs in your browser and UtilHub does not receive or store the values you enter. Your browser or device may still retain normal local history or form data.
How does this text diff checker work?
A local sequence comparison aligns matching lines and labels the remaining additions and deletions.
What should I check before using the result?
Very large files or moved paragraphs may be clearer in a dedicated version-control diff.