Paste two blocks of text, JSON, or code and see exactly what changed. Additions, deletions, and unchanged lines — all highlighted instantly.
Every line is compared and color coded — green for additions, red for deletions, neutral for unchanged lines.
Paste two JSON objects and get a clean, formatted diff. Both sides are pretty-printed before comparison.
See at a glance how many lines were added, removed, and unchanged — so you know the scale of the change immediately.
Flip original and modified with one click — useful when you're not sure which version is which.
Results update automatically as you type — no need to click Compare every time you make a change.
Your code, configs, and text never leave your browser. Safe to use with production configs and sensitive data.