XML Formatter & Beautifier, Pretty-Print or Minify Online

What is the xml formatter?

The XML Formatter beautifies or minifies XML with real well-formedness checking, preserving CDATA, comments, the declaration and processing instructions untouched. When markup is broken, it points at the precise error line. Free and client-side, your XML is processed in the browser and never uploaded.

The GigAI XML Formatter is a desktop-grade XML editor that runs entirely in your browser. Paste, drop or type XML and it pretty-prints with 2-space, 4-space, or tab indentation, or minifies every scrap of insignificant whitespace away for the smallest transport payload. Unlike naive formatters that mangle your document, it treats comments, CDATA sections, the `<?xml ...?>` declaration, processing instructions and `<!DOCTYPE>` as verbatim blocks, they come out exactly as they went in, and it inlines simple text nodes like `<title>Hello</title>` onto a single line so the result reads the way a human would write it. Self-closing tags stay self-closing. Crucially, it doesn't just reflow: it runs your markup through the browser's native XML parser to check real well-formedness, so mismatched tags, unclosed elements, stray `<` and `&`, or a broken CDATA close are flagged with the line where the parser gave up, the difference between a two-second fix and squinting at a wall of angle brackets. It shows the byte size before and after so minify savings are visible, keeps a full undo/redo history, imports by drag-drop or paste, and exports or shares in a click. Because parsing and formatting happen locally with the browser's own XML engine, your documents (SOAP payloads, SAML assertions, config files, sitemaps, invoices) are never uploaded, logged or seen by anyone. Close the tab and it's gone.

Difficulty:

Easy

Typical time:

~15s

Processing:

100% browser processing

Last updated Jul 2, 2026