Diff Checker
Compare two blocks of text and highlight the differences. See additions, removals, and unchanged content at a glance.
Frequently Asked Questions
How does the diff checker work?▾
Paste your original text and modified text, then click Compare. The tool highlights additions in green, removals in red, and unchanged text in gray so you can spot every difference instantly.
Can I compare code with this diff tool?▾
Yes. The diff checker works with any plain text including source code, configuration files, markdown, and prose. Use line-by-line mode for structured content like code.
Is my data safe when comparing text?▾
Yes. All comparison happens entirely in your browser. No data is ever sent to a server.