Text Diff Checker
Compare two blocks of text and highlight the differences, for free.
This tool runs entirely in your browser. Your files are never uploaded to a server.
Paste two blocks of text to compare them line by line and instantly see which lines were added, removed, or changed. Useful for comparing document revisions, code snippets, or configuration files without installing any software. Everything runs locally in your browser — your text is never uploaded to a server.
Frequently Asked Questions
- How does the text diff checker work?
- Paste your original text on one side and the changed version on the other. The tool compares them line by line and highlights added, removed, and changed lines.
- Can I use it to compare code?
- Yes, it works with any plain text, including source code, configuration files, or JSON — as long as it's line-based text.
- Is my text kept private?
- Yes. The comparison happens entirely in your browser — your text is never sent to or stored on a server, and the tool is completely free.