📊 Text Diff Checker

Compare two texts and highlight the differences line by line.

🔒
100% Secure & Private Your data never leaves your browser. Nothing is stored or transmitted.

❓ Frequently Asked Questions

Yes. This tool runs 100% in your browser using JavaScript. Your data is never sent to any server. You can verify this by opening your browser's Developer Tools (F12) → Network tab and watching that no requests are made when you use the tool.

No. Your data exists only in your browser's memory while you use the tool. When you close the tab or refresh the page, all data is completely gone. We don't use cookies, localStorage, or any form of storage for your input data.

Yes! Once the page loads, you can disconnect from the internet and the tool will continue to work. This proves that no server communication is required.

You can verify security in three ways:

  1. Open Developer Tools (F12) → Network tab → Use the tool → See zero network requests
  2. Disconnect your internet and verify the tool still works
  3. View the page source - all code is visible and auditable

Yes. Right-click → View Page Source to see all the code. The diff algorithm used is a standard LCS-based implementation.

Security & Privacy

This tool is designed with your privacy and security as the top priority. Here's how we protect your data:

✓
100% Client-Side Processing All text comparison happens in your browser. Your data never leaves your device.
✓
Zero Data Transmission No server requests are made when you use the tool. Verify this in your browser's Network tab.
✓
No Data Storage We don't use cookies, localStorage, or any storage for your input. Data is gone when you close the tab.
✓
Works Offline Once loaded, the tool works without internet. This proves no server dependency.
✓
Open Source & Auditable View the page source anytime. All code is transparent and uses standard algorithms.

How to Verify