Text Diff Checker
Compare two text contents and see what changed between them.
Frequently asked questions
How do I compare two texts?
Paste the old text on the left and the new one on the right. Added and removed parts are highlighted in color.
Is it suitable for contract drafts?
Yes, that is a good use for it. Both versions stay in your browser and nothing is sent to a server.
How does this tool work?
Visualizes the differences between two text versions through color highlighting.
Paste the original text into the left field and the modified version into the right field. The tool analyzes both texts line by line with an LCS algorithm and marks added lines in green and removed lines in red. Ideal for checking code changes or text corrections.
Where are my data processed?
Only in your browser. Your data is not sent to any server.
The tool calculates and converts with JavaScript right on your device. Input and files are not sent to us or anyone else. You can check this yourself: load the page, disconnect from the internet, and the tool keeps working in the open tab.