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". Diffing two API responses is mostly noise until both sides are formatted the same way: run them through the JSON Formatter first.
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