Diff Checker
Paste two versions of text, JSON or XML to see exactly what changed — line by line, word by word. Everything runs locally in your browser.
About this diff checker
A diff (difference) tool aligns two texts and marks what was removed and what was added. This one computes a longest-common-subsequence diff at the line level, then a second pass at the word level inside changed lines so you see the precise edit, not just "this line changed".
Options
- Side by side / Inline: two columns, or a single unified column with
+/-markers - Ignore whitespace: treats lines that differ only in spacing or indentation as equal
- Text, JSON or XML: the diff is line-based, so any text format works — pretty-print your JSON first for the cleanest result
- Share: encodes both inputs in the URL fragment (after
#) so nothing is sent to a server