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Text Diff Checker

Compare two text blocks and highlight every difference, line by line.

Coming soon: this tool's interactive UI is being wired up. The marketing page is live now; processing arrives with Phase 2.

About Text Diff Checker

Compare two text blocks and highlight every difference, line by line.

Our free online text diff checker tool runs entirely in your browser when possible, with secure server-side processing as a fallback. No signup required, no software to install, and your files are deleted from our servers within 1 hour.

Privacy first: Your files are processed using client-side JavaScript when possible. Files sent to our servers are encrypted with TLS and automatically deleted within 1 hour.

Security & Privacy

We take your data security seriously. Here's how we protect your files:

  • TLS encryption: All file transfers are encrypted using industry-standard TLS 1.3 protocol.
  • Auto-deletion: Uploaded files are automatically and permanently deleted from our servers within 1 hour.
  • No access: We never read, analyze, or store the contents of your files.
  • Browser processing: When possible, files are processed directly in your browser without being uploaded.

Frequently Asked Questions

Upload your file, click the action button, and download the result. Everything runs through our secure pipeline — no signup needed.
Yes. All file transfers use TLS encryption. Uploaded files are automatically deleted from our servers within 1 hour.
Free users can process files up to 50MB. Premium users get larger limits and priority processing.
No. Text Diff Checker runs entirely in your browser — works on Windows, Mac, Linux, iOS, and Android.
Yes. The core tool is free for everyone. Premium plans unlock larger file sizes, batch processing, and priority queues.