HTML Formatter & Beautifier
Beautify messy HTML into clean, indented markup, or minify it for transport — with well-formedness kept intact either way.
Want to see this markup rendered instead of formatted? Try the HTML Viewer, or encode special characters with the HTML Entity Encoder & Decoder.
Your Data Never Leaves Your Device
Every tool runs entirely in your browser. Nothing you type is uploaded, stored, or logged on our servers.
The HTML Formatter is a free, client-side tool that beautifies messy, minified, or CMS-exported HTML into clean, consistently indented markup — or minifies it back down for production.
Choose an indent size, optionally force one attribute per line for wide elements, and everything updates instantly. Minify mode also compresses any embedded <script> and <style> content. Nothing is uploaded — your markup never leaves the browser, which makes it safe to use with internal templates and proprietary code.
FAQ
It re-indents HTML so nested elements are visually clear, making minified or hand-mangled markup readable again. This tool also runs the reverse direction — minifying already-readable HTML for transport.
No — it formats and minifies markup, it doesn't check it against the HTML spec or catch invalid tag nesting. For that, use a dedicated HTML validator.
No. Formatting and minifying both run entirely in your browser — nothing is uploaded to a server.
Yes. Beautify mode re-indents the whole document; minify mode also minifies the JavaScript inside <script> tags and CSS inside <style> tags, while leaving <pre> and <textarea> content untouched.
The HTML/CSS/JS Minifier is a general-purpose tool covering all three languages behind a language switch. This page is HTML-only, with beautify as a first-class mode (not just minify) and HTML-specific options like one-attribute-per-line formatting.