Developer
HTML Beautifier
Pretty-print HTML with indentation for readable markup—runs locally in your browser.
Use tool ↓HTML Beautifier
Pretty-print and indent HTML code for readable markup. Format messy HTML instantly in your browser. Free HTML beautifier — no server upload, no login needed. This tool is designed for fast, browser-first execution so you can finish routine tasks without switching apps. Everything runs locally in your browser — your data stays on your device unless the tool explicitly calls an API.
How to Use
- Open the HTML Beautifier tool on it3.site
- Enter or paste your input in the fields above
- Click the primary action button to process your data
- Copy or download the result for your project
- Bookmark this page for quick access later
Key Features
- Free HTML Beautifier u2014 no signup required
- Runs entirely in your browser for privacy
- Mobile-friendly responsive interface
- Part of it3u2019s Developer tool suite
- Fast results with no file uploads to our servers (unless noted)
- Works offline after the page loads
Frequently Asked Questions
Parser normalization?
DOMParser rebuilds a treeu2014browser 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 beautifyu2014editors like VS Code may be safer for huge SVG.
`<template>` content?
Inert template contents might serialize differentlyu2014spot-check shadow-DOM or framework partials.
Security?
Beautifying does not sanitize XSSu2014escape 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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