HTML Formatter — Free HTML Beautifier & Minifier
Beautify, minify and validate HTML code instantly.
Frequently asked
Untangling Markup You Didn't Write
Where unreadable HTML comes from
Nobody writes single-line HTML; machines do. Formatting is the first step to working with it:
| Source | What you're handed |
|---|---|
| View-source / production pages | Minified single line, thousands of characters |
| CMS and page-builder exports | Deeply nested divs with generated class names |
| Email templates | Table-based layouts with inline styles everywhere |
| Scraped content | Markup plus tracking scripts plus broken fragments |
| AI-generated snippets | Valid but chaotically indented |
Indentation is debugging
The bug class formatting exposes: structure errors. A div that never closes, a list item outside its list, a form inside a form — invisible in a single line, obvious the moment nesting is indented. The workflow: format, then scan for the indentation that doesn't step back where you expect. Layout mysteriously breaking at one element is, more often than not, an unclosed tag several elements earlier — formatted markup turns that hunt from minutes into seconds.
In and out of HTML
Formatted markup heading back to production should be minified again — whitespace costs bytes (the JS and CSS minifiers handle their layers). Content being rescued from markup for editing converts via HTML to Markdown, and special characters that display wrong (& soup) decode in the entities tool.