Text Diff Checker Tutorial

Learn how to compare text, files & PDFs using a professional unified diff tool

🔍 OPEN TEXT DIFF TOOL

⚡ Quick Start – How to Use Text Diff Checker

  1. Paste or upload your Original Text
  2. Paste or upload your Modified Text
  3. Click Compare / Unified Diff
Original Text: Hello World Modified Text: Hello World!

- Hello World
+ Hello World!

🚀 TRY NOW

📘 Chapter 1: Basic Text Comparison (Beginner)

Text Diff Checker compares two texts line by line and highlights:

  • Yellow (+) → Added text
  • Red (-) → Removed text
  • Unchanged lines → Same in both inputs

Perfect for writers, students, editors, and content reviewers.

📙 Chapter 2: Unified Diff & Line Numbers (Intermediate)

Unified Diff shows changes in a GitHub-style format:

@@ Unified Diff @@ - This is old text + This is new text
  • ✔ Easy to read
  • ✔ Developer-friendly
  • ✔ Perfect for code & documentation
🔧 USE UNIFIED DIFF

📗 Chapter 3: Advanced Features (Advanced)

📄 File & PDF Comparison

  • Upload .txt files
  • Compare PDF documents
  • Instant text extraction

␣ Whitespace Highlighting

  • Detect extra spaces
  • Identify tab differences
  • Great for coding & formatting checks

🌗 Dark / Light Mode

  • Eye-friendly dark mode
  • Light mode for print review
  • Mobile-optimized layout

💼 Who Should Use Text Diff Checker?

🔒 Privacy & Security

All comparisons happen inside your browser.

❓ Frequently Asked Questions

Q: Can I compare PDFs?
Yes. The tool extracts and compares PDF text.

Q: Is this tool free?
Yes. 100% free, no signup required.

Q: Does it work on mobile?
Yes. Fully responsive and mobile-optimized.

Ready to Compare Text?

Use our fast, secure, and professional Text Diff Checker now.

🔍 OPEN TEXT DIFF CHECKER

Tool URL: text-diff.html