Text Diff Checker
Compare two texts, code snippets, or documents side-by-side with line-by-line and character diff highlighting locally in your browser.
This tool runs in your browser.
Original text
Changed text
How to use
- 01Paste the original text into the left pane and modified text into the right pane.
- 02The diff algorithm calculates additions, deletions, and modifications in real time.
- 03Review highlighted side-by-side changes without sending any text to external servers.
FAQ
Does the comparison highlight word-level or line-level differences?
Both. The tool computes line-level additions and deletions while highlighting fine-grained word and character alterations within modified lines.
Can I compare code snippets, configuration files, and legal documents?
Yes. It is ideal for code reviews, patch comparisons, configuration audits, and proofreading contract amendments across revisions.
Is sensitive text uploaded to a server during comparison?
No. All diff computation runs strictly inside your local browser memory using JavaScript. None of your text is sent over the network.