Developer ToolsCode FormattersFree Tool
HTML Prettifier
Reformat HTML with proper nested indentation based on actual tag depth, handling void elements like <br> and <img> correctly.
How to Use HTML Prettifier
- 1Paste your HTML code
- 2Click Process
- 3Copy the properly indented output
Frequently Asked Questions
It tokenizes your HTML into tags, comments, and text, then increases indent depth on each opening tag and decreases it on each matching closing tag — void elements like <br>, <img>, <input>, and <hr> don't increase depth since they never close.
No — it only reformats whitespace/indentation based on tag structure; it doesn't check for unclosed tags, invalid nesting, or other HTML errors. Use the HTML Validator for that.
No, the opposite — it expands minified/compact HTML into a readable, indented format.
Yes — attributes inside a tag are left exactly as you typed them; only the line breaks and indentation around tags are changed.
Related Tools
CSS Prettifier
Reformat minified or messy CSS with a newline after each rule, selector, and declaration for readability.
SCSS Formatter
Clean up whitespace and blank lines in SCSS/Sass code — a light touch-up, not a full SCSS-aware reformatter.
LESS Formatter
Clean up whitespace and blank lines in LESS stylesheet code — a light touch-up, not a full LESS-aware reformatter.
JSON5 Formatter
Strip comments and trailing commas from JSON5 input, then pretty-print it as standard indented JSON.