Compare two texts and instantly see what changed. Additions highlighted in green, deletions in red.
This text diff checker instantly compares two versions of any text and highlights the differences. Additions are shown in green, deletions in red, making it easy to spot exactly what changed.
Perfect for writers comparing drafts, developers reviewing code changes, or anyone tracking revisions between document versions.
The tool compares the two texts word by word using a longest common subsequence algorithm. It then highlights additions in green and deletions in red, showing you exactly which words were added, removed, or changed.
All comparison happens entirely in your browser — your text is never sent to any server.
When you ask an AI model to rewrite or improve a piece of text, it can be hard to spot what actually changed. Paste the original response in the left box and the revised version in the right box, then click Compare. The diff view shows you precisely which words were added, removed, or replaced — making it easy to evaluate whether the AI's edits are improvements.
Yes, this tool is completely free to use. No registration, no login, and no subscription required. Just open the page and start using it.
Yes, your data is safe. All processing happens entirely in your browser — your input never leaves your device and is not sent to any server.
Yes. The tool is fully responsive and works on smartphones, tablets, and desktop computers.
The tool uses standard algorithms and web APIs to provide accurate results. For critical or professional use, please verify with additional sources.