XML formatter

Beautify, minify, validate and convert XML ↔ JSON — with live preview.

Features

Beautify and minify preserve comments, CDATA, attributes and the XML declaration — only whitespace changes.
Inline validation pinpoints the first well-formedness error by line and column.
Two-way XML ↔ JSON conversion keeps attributes (as @_ keys) so nothing is lost on the round trip.

How it works

Paste, type or drop any XML — or JSON, for the JSON → XML mode — into the input pane. Well-formedness is checked inline as you type, flagging the line and column of the first error.
Pick a mode — Beautify, Minify, XML → JSON or JSON → XML — and an indent size (2 spaces, 4 spaces or tab).
The result updates live; copy it to the clipboard or download it as a .xml or .json file.

Your files never leave this page

Every conversion runs entirely in your browser using WebAssembly. There is no upload, no server-side processing, no analytics, and no cookies. Open DevTools → Network during the operation and you will see zero outbound traffic.

Topics covered

xml formatter online
xml beautifier
minify xml
xml validator
pretty print xml
xml to json
json to xml
free xml formatter