HTML Beautifier

Turn dense or minified HTML into indented markup for review and diffs. Processing stays in your browser.

HTML input

Output

FAQ

Parser normalization?

DOMParser rebuilds a tree—browser may reorder attributes or inject implicit `<html>` wrappers for fragments. Expect semantic equivalence, not byte-identical HTML.

Inline SVG or MathML?

Complex namespaces usually survive, but verify specialized attributes after beautify—editors like VS Code may be safer for huge SVG.

`<template>` content?

Inert template contents might serialize differently—spot-check shadow-DOM or framework partials.

Security?

Beautifying does not sanitize XSS—escape user HTML before injecting into pages.

Large email HTML?

May lag; use IDE formatters for multi-megabyte templates.

Privacy?

Runs locally.

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