Format messy email html newsletter in browser

HTML Formatter is a professional tool for beautifying and minifying HTML code. It helps front-end developers tidy up one-line minified HTML and, in the other direction, compress HTML to reduce page size and improve load speed. It automatically recognises tag nesting, aligns attributes, preserves whitespace nodes and works with HTML5, XHTML and template fragments alike.

Step 1 — paste the HTML you want to process on the left, or click "Sample" to load a test example. Step 2 — the tool beautifies the code in real time, indenting by tag depth (2 spaces by default). Step 3 — click "Format" to explicitly trigger a full pass. Step 4 — click "Minify" to strip extra whitespace, newlines and comments (preserving necessary spaces) into a compact single-line result. Step 5 — the right panel supports one-click copy or download as a .html file.

Format server-rendered HTML during debugging to read it more easily; normalise the complex markup produced by Bootstrap or Tailwind before editing; expand one-line email templates for maintenance; minify HTML before deployment to reduce first-paint time; format Vue / React SSR output for SEO analysis.

Formatting uses lightweight rules rather than a full DOM parse, which suits most common structures. Whitespace inside <pre>, <code> or <textarea> is preserved as much as possible. Self-closing tags (<br />, <img />) are left untouched. HTML comments <!-- --> are preserved when beautifying and removed when minifying. Deep formatting of <script> or <style> content is not supported — use the dedicated JS or CSS tools for that.

All formatting and minifying happens locally in your browser. The HTML you enter is never uploaded, so you can safely process intranet systems or production templates.