Text Diff Tool
Paste two versions of a text and instantly see what changed. Added lines are highlighted in green, removed lines in red, and unchanged lines are shown as-is. Useful for comparing code, documents, or any text.
Your files stay private
All processing happens directly in your browser using WebAssembly. Your files are never uploaded to any server and never leave your device.
How to Use Text Diff Tool
- 1
Paste the original text in the left editor
- 2
Paste the modified text in the right editor
- 3
Click Compare Texts
- 4
Review the highlighted differences
Frequently Asked Questions
Can I compare code files?
Yes. Paste any code text into both fields and the diff will highlight exactly which lines changed.
Is there a text length limit?
There is no enforced limit, though very large texts may be slower to process in the browser.
Features
- Line-by-line comparison
- Color-coded output (green = added, red = removed)
- Summary stats (added/removed/unchanged lines)
- Works with any plain text or code
- 100% browser-based — private
Supported Formats
Input
Output
DiffPrivacy First
All conversions happen in your browser. Nothing is uploaded to our servers. Your files remain completely private.