About Online Diff Checker
Comparison is line by line, so an edited line reads as one removal plus one addition rather than a character-level patch. That suits config reviews and copy revisions, where which lines changed matters more than which characters did.
Paste two versions of a file to see exactly which lines were added, removed or changed, colour-coded side by side. The comparison runs in your browser, so confidential drafts stay private.
Compare two blocks of text side by side and highlight every line that was added, removed or changed. It is the fast way to review edits to copy, configuration files, code snippets, contracts or any two versions of a document without installing a desktop diff tool.
Paste the old version on one side and the new on the other for a colour-coded breakdown of exactly what moved. A reordered block shows as a deletion plus an insertion rather than a move, which is worth knowing before reading a long diff.