Text Diff Checker
Compare texts and spot differences instantly.
Frequently Asked Questions
Is this online text diff checker free to use?
Yes, KNothing Text Diff Checker is a 100% free online tool for comparing texts. You can compare unlimited files, code snippets, or documents without any cost or subscription.
Is my data secure when using this tool?
Your privacy is guaranteed. This is a client-side diff tool, meaning the comparison logic runs entirely in your browser using JavaScript. Your text data is never uploaded to any server.
What kind of text can I compare?
You can compare any plain text content, including code snippets (HTML, JSON, Python), configuration files, legal documents, or articles. It highlights added, removed, and changed lines instantly.
Does it work offline?
Yes. Once the page loads, you can use the tool fully offline. It doesn't require an active internet connection to perform the text comparison since it runs locally on your device.
Can I copy the comparison results?
Currently, you can view the detailed line-by-line differences in the result view. We are working on adding more export options, but you can always screenshot the highlighted results for sharing.