Diff Checker
Compare two blocks of text with color-coded additions and deletions — 100% local processing
Original
Modified
How to use Diff Checker
Paste your original text on the left and modified text on the right, then click Compare. Additions are highlighted in green, deletions in red. Line numbers are shown for easy reference.
Why compare text locally?
Your code and text never leave your browser. Devault uses an LCS-based diff algorithm running entirely client-side, making it safe to compare sensitive source code and configuration files.