Text Diff Viewer
Compare two texts — line-by-line diff with colors
🔒 Files never leave your browser
How to Use Text Diff Viewer
Enter texts
Paste original and modified text.
Compare
See colored diff output.
Review
See additions, deletions, and unchanged lines.
Why Choose AllTools Text Diff Viewer?
- ✓ 100% free, no account needed
- ✓ Line-by-line diff
- ✓ Color-coded output
- ✓ Addition/deletion stats
- ✓ Side-by-side input
- ✓ No data stored or transmitted
Why Use This Tool
- ★ No data leaves your browser — text stays private on your device
- ★ Real-time processing with instant results
- ★ No account or sign-up required
- ★ Completely free with no character or word limits
- ★ Works on any device with a modern browser
Related Resources
Frequently Asked Questions
How does the diff work? ▼
It compares lines between the two texts and highlights additions, deletions, and unchanged lines.
Is this private? ▼
Yes. All comparison happens in your browser.
Is there a file size limit? ▼
No strict limit. Processing happens in your browser, so capacity depends on your device memory. Most files work smoothly.
Which browsers are supported? ▼
All modern browsers including Chrome, Firefox, Safari, Edge, and Opera on both desktop and mobile.
Can I use this offline? ▼
Yes. Once the page is loaded, the tool works without an internet connection since all processing is local.
Is my data secure? ▼
Yes. Your data never leaves your browser. Nothing is stored on or transmitted to any server.
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