± Diff Checker

Free online tool for comparing two text blocks and highlighting differences — no signup required.

⚡

Instant Processing

All processing happens in your browser. No server needed.

🔒

100% Private

Your data never leaves your browser. We don't store anything.

🌐

Free Forever

No signup, no limits. Use as much as you need.

What is Diff Checker?

Diff Checker is a free online tool for comparing two text blocks and highlighting differences. Whether you are a developer, student, or professional — this tool makes text comparison simple and fast.

How to Use

  1. Enter or paste your data into the input field
  2. Click Process to see the result
  3. Copy the output or use it directly

Features

  • 100% client-side processing — no data sent to servers
  • Works on all devices: mobile, tablet, desktop
  • No registration or signup required
  • Fast and lightweight
  • Free to use without limits