Paste an original and a changed text to instantly see line and word-level differences highlighted side by side.
🔒 Your text stays on your device and is never uploaded.
Paste an original and revised version of any text, config file or paragraph to see additions, removals and word-level edits color-coded in one view, without installing a diff tool.
Matching lines are aligned with an LCS-based diff, then word-level changes are highlighted within them.
Ignore letter case or trim trailing whitespace so formatting noise does not count as a change.
Comparison runs entirely in your browser. Nothing is uploaded.
It uses a longest-common-subsequence algorithm to align matching lines between both texts, then marks the rest as added or removed.
Yes. When a line changes, the tool also runs a word-level comparison on that line so you can see exactly which words changed.
Yes. Toggle the case-insensitive or trim-whitespace options above the editors before comparing.
No. Comparison runs entirely in your browser using JavaScript.