HTML Formatter & Beautifier
This HTML formatter takes messy, minified, or hand-written HTML and re-indents i
This HTML formatter takes messy, minified, or hand-written HTML and re-indents i
How to use HTML Formatter & Beautifier
- Paste your HTML into the input box.
- Choose Beautify or Minify and pick your indentation.
- Copy the cleaned-up output or download it as an .html file.
About HTML Formatter & Beautifier
This HTML formatter takes messy, minified, or hand-written HTML and re-indents it so every nested element sits on its own line at the correct depth. It also works in reverse: switch to Minify mode to strip comments and collapse whitespace down to a single compact line. You can pick 2-space, 4-space, or tab indentation and optionally force all tag names to lowercase.
The tool parses your markup with a small tokenizer that understands tags, attributes, comments, and the doctype. Content inside pre, textarea, script, and style is captured and left intact, so whitespace-sensitive text and embedded code are never mangled. Quoted attribute values are respected, and unbalanced or unclosed tags are handled gracefully rather than throwing an error — though the cleaner your input, the cleaner the result.
Everything runs entirely in your browser using plain JavaScript. Your HTML is never uploaded, stored, or sent to a server, which makes it safe for pasting internal templates or work-in-progress code. Note that this is a formatter, not a validator: it tidies structure and indentation but does not check your HTML against the spec or fix genuinely broken markup.
Frequently asked questions
- How do I use the HTML beautifier?
- Paste your HTML into the box, leave the mode on Beautify, and the indented result appears instantly below. Choose 2 spaces, 4 spaces, or a tab for indentation, then copy the output or download it as an .html file.
- What is the difference between beautify and minify?
- Beautify expands your HTML with line breaks and indentation so it is easy to read and edit. Minify does the opposite: it removes comments and collapses whitespace into one compact line to reduce file size. Use the Mode dropdown to switch between them.
- Will it break my script, style, or pre content?
- No. Content inside pre and textarea is kept exactly as typed, and script and style blocks are preserved and re-indented as a unit rather than being reparsed as HTML, so your embedded code and whitespace-sensitive text stay intact.
- Is my HTML uploaded anywhere?
- No. The formatter runs 100% in your browser with JavaScript. Nothing is sent to a server, saved, or logged, so it is safe for internal templates and unpublished code.
- Does it validate or fix broken HTML?
- It is a formatter, not a validator. It re-indents structure and auto-closes obviously unbalanced tags, but it does not check your markup against the HTML spec or repair genuinely malformed code. Fix structural errors before formatting for best results.
- Can it handle large HTML files?
- Yes, within reason. Because it processes everything locally in the browser, very large files depend on your device's memory and speed, but typical pages and templates format in a fraction of a second.