Text Diff
Paste text, drag files anywhere on this page, or open one/both sides. Multi-select or drop two files → A then B. Right-click the diff to Align with… Share links embed text in the URL hash.
File A
File B
Paste, open, or drop files anywhere on this page to start comparing.
Agents: embed pane text in the link (hash preferred). Example: /tools/text-diff/?aName=before.txt&bName=after.txt#a=u.…&b=u.… aPath/bPath are labels only — browsers cannot open local disk paths from a URL.