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HTML Formatter, Beautifier & Minifier

Format, beautify and minify HTML instantly in your browser. Indent messy markup or compress it to ship — free, private, and your HTML never leaves your device.

No Tracking Runs in Browser Free
Indent
Formatted HTML

🔒 100% in-browser — your HTML never leaves your device.

Reviewed for render-safe formatting and whitespace-aware minification — Go Tools Engineering Team · Jun 5, 2026

What is HTML Formatting?

HTML formatting (also called beautifying or pretty-printing) rewrites markup with consistent nesting, indentation and line breaks so its structure is easy to read and edit. The page renders identically before and after — only whitespace changes. Minifying does the reverse: it removes comments and collapses whitespace — including embedded CSS and JS — so pages load faster. This tool does both, entirely in your browser.

Key Features

Format and minify

Beautify messy markup for readability or compress it — including inline CSS and JS — for production.

Byte-savings readout

See exactly how many bytes minification saved on each run.

100% private

All processing happens in your browser. Your HTML is never sent to a server.

Style controls

Choose 2-space, 4-space or tab indentation to match your conventions.

Examples

Minified markup

<nav><ul><li><a href="/">Home</a></li><li><a href="/about">About</a></li></ul></nav>

Expand one-line markup into a readable, indented tree.

Form with attributes

<form action="/submit" method="post"><input type="email" name="email" required><button type="submit">Send</button></form>

Lay out form controls and their attributes line by line.

Table

<table><thead><tr><th>Name</th><th>Role</th></tr></thead><tbody><tr><td>Ada</td><td>Engineer</td></tr></tbody></table>

Indent nested table sections so structure is obvious.

Inline SVG

<svg viewBox="0 0 24 24"><path d="M5 12h14"/><path d="M12 5v14"/></svg>

Format inline SVG markup for readability.

Common Use Cases

Clean up generated markup
Beautify HTML exported by a CMS or builder so you can read and edit it.
Code review
Format markup before a pull request for consistent, diffable templates.
Ship smaller pages
Minify production HTML to cut bytes and improve load time.
Inspect a snippet
Paste markup copied from a page and format it to understand its structure.

Technical Details

Beautified with js-beautify
Uses the proven js-beautify HTML engine for predictable, configurable indentation.
Minified with CSSO + Terser
Collapses whitespace, strips comments and minifies embedded CSS and JS without altering rendering.
Browser-based
Runs entirely client-side; no HTML ever leaves your device or hits a server.

Best Practices

Format source, minify for production
Keep readable HTML in your repo and minify as a build step.
Pick one indentation style
Agree on 2 spaces, 4 spaces or tabs for clean diffs.
Mind pre/textarea whitespace
Minification can change whitespace-sensitive elements like pre and textarea — verify after compressing.

Frequently Asked Questions

How do I format HTML online?
Paste your HTML into the input box and click Format. The tool reindents the markup with proper nesting and line breaks, then lets you copy it. Everything runs locally in your browser — nothing is uploaded.
How do I minify HTML?
Paste your HTML and click Minify. The tool removes comments and collapses whitespace — including embedded CSS and JavaScript — to produce the smallest equivalent markup, and shows how many bytes you saved.
What is the difference between formatting and minifying HTML?
Formatting (beautifying) adds indentation and line breaks to make markup readable. Minifying strips comments and whitespace to shrink the file for faster loading. Both render identically in the browser.
Does formatting change how my page renders?
Formatting only adds whitespace, which is safe for normal markup. Be aware that whitespace-sensitive elements like pre and textarea can be affected by reformatting or aggressive minification — verify those after processing.
Is my HTML safe with this tool?
Yes. All formatting and minifying happen locally in your browser using JavaScript — your HTML is never sent to any server, logged, or stored. That makes it safe for proprietary or unreleased markup, unlike server-side tools that receive a copy of everything you paste.
Does it minify inline CSS and JavaScript?
Yes. The minifier compresses style and script contents too, so a single pass shrinks your whole document — markup, styles and scripts together.
What indentation should I use for HTML?
Two spaces is the most common default and keeps diffs compact; four spaces can help with deeply nested layouts; tabs let each developer choose their width. Pick one and apply it consistently — this tool supports all three.

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