Developer•Free tool
Text Diff Viewer – Compare Text Side by Side
Compare two texts or code snippets line by line. Highlight added, removed, and unchanged lines with a clear side-by-side diff.
No sign-upBrowser-based
DEV
Tool
Enter your values and get results instantly.
HOW
How to Use
- 1Paste the original text in the left box
- 2Paste the modified text in the right box
- 3View the highlighted differences instantly
WIN
Benefits
Side-by-side comparison
Added/removed line highlighting
Works with code & text
Instant results
Free & private
FAQ
Frequently Asked Questions
How does the diff algorithm work?
It uses a Longest Common Subsequence (LCS) algorithm to find the minimal set of changes between the two texts, line by line.
Can I compare code files?
Yes. The tool works on any text, including source code. Each line is compared and differences are highlighted.
Is my data sent to a server?
No. All comparison happens locally in your browser. Your text never leaves your device.
What do the colors mean?
Green lines are added, red lines are removed, and white lines are unchanged. This makes changes easy to spot at a glance.
Does it handle large files?
It handles typical files well. For extremely large files, performance may vary depending on your device.