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Common ways to use this tool:

Reviewing code changes
Compare two versions of a file to see exactly which lines were added, removed, or modified.
Spotting edits and typos
Paste an original and a revised text to review every change at a glance.
Debugging configuration
Diff two config files to find the setting that was changed or removed.
Document versioning
Track how a document evolves between drafts by comparing consecutive versions.
Verifying translations
Compare a source text with its translation to check for missing or altered lines.

How do I use this tool?: Enter or paste the required input, adjust any options, run the primary action, and review the result. Use the Clear/Reset control to start over.
Is this tool free to use?: Yes. The tool is free to use and does not require an account.
What happens to my input data?: The tool does not store user-provided input. If any network request is required for a feature, the tool will clearly disclose it in the Help section.
Why am I getting an error or unexpected output?: Most issues come from invalid input or incompatible options. Verify the input format, try the default settings, and use Clear/Reset before trying again.
Where can I find instructions and troubleshooting tips?: Use the in-app Help panel. It explains inputs, options, and common mistakes, and it is usable with a keyboard (including closing with Escape).