All ToolsCompare two code snippets side by side with syntax highlighting. Additions in green, deletions in red. Supports 40+ languages.
Compare two code snippets with syntax-highlighted side-by-side diff. See additions, deletions, and unchanged context at a glance. Supports JavaScript, Python, TypeScript, CSS, HTML, SQL, and 30+ more languages. Everything runs in your browser — your code stays private.
Paste your original code on the left and modified code on the right. Click Compare — additions are highlighted green, deletions red, and unchanged lines stay neutral. Line numbers are shown for easy reference.
Yes. Select your language and the diff output gets syntax-highlighted, making it easier to read complex changes in context.
No. The comparison runs entirely in your browser using a client-side diff library. Your code never leaves your device.