Free HTML Beautifier Online
Transform messy, minified, or unformatted HTML into clean, readable code with proper indentation. Powered by Prettier.
HTML Beautifier
What is HTML Beautification?
HTML beautification (also called pretty printing) adds proper indentation, line breaks, and consistent formatting to HTML code without changing how the page renders in a browser. Minified or auto-generated HTML is often a single line with no whitespace, making it impossible to read or debug. Beautification converts it into structured, human-readable code.
Why Beautify HTML?
- •Readability: formatted code is dramatically easier to read, understand, and review.
- •Debugging: proper indentation reveals nesting errors, unclosed tags, and structural issues instantly.
- •Code reviews: reviewers can see the structure and hierarchy clearly without mental parsing.
- •Collaboration: consistent formatting reduces merge conflicts and communication overhead.
- •Documentation: readable HTML is easier to document and hand off to other developers.
Why Prettier is the Gold Standard
Prettier is the most widely used code formatter in the world, with hundreds of millions of weekly npm downloads. Unlike basic indentation scripts, Prettier understands HTML semantics: it handles inline elements differently from block elements, respects whitespace sensitivity inside elements like pre and code, and formats embedded CSS and JavaScript within HTML files. This tool uses Prettier's standalone browser build so your code never leaves your device.
HTML Indentation Best Practices
The most important rule is consistency. Choose one style and apply it everywhere in your project.
| Style | Common In | Pros |
|---|---|---|
| 2 spaces | Google, most modern JS projects | Compact, less horizontal scrolling |
| 4 spaces | Microsoft, Python, PHP projects | Clear visual hierarchy, widely familiar |
| Tabs | WordPress, some legacy codebases | Customisable width per editor |
Frequently Asked Questions
What is the difference between beautify and format HTML?
They are the same thing. Both add indentation and line breaks without changing how the page renders. Beautify is preferred by designers; format is preferred by developers.
Should I use 2 spaces or 4 spaces for HTML indentation?
Both are widely used. Google recommends 2 spaces. 4 spaces is common in enterprise projects. Choose one and apply it consistently. This tool supports Tab, 2, 4, 6, and 8 space indentation.
Does beautifying HTML change how the page looks?
No. Browsers ignore extra whitespace in HTML. Beautification only affects the source code readability, not the rendered output.
How do I beautify HTML in VS Code?
Install the Prettier extension and press Shift+Alt+F (Windows) or Shift+Option+F (Mac). This tool uses the same Prettier engine without any installation.
Can I beautify HTML with inline CSS and JavaScript?
Yes. Prettier formats HTML, inline CSS inside style tags, and JavaScript inside script tags all in one pass.