HTML Formatter
Trending 🔥Format and beautify HTML code
How to Use HTML Formatter
- 1Paste HTML in the input
- 2Click Format or Minify
- 3Copy the result
About HTML Formatter
HTML Formatter beautifies and formats raw or minified HTML code with proper indentation and consistent structure, making it readable for code review, debugging, and documentation. Paste any HTML — from a single snippet to a full page — and get clean, properly nested output instantly.
Front-end developers regularly receive HTML from template engines, server responses, or code generators that produces a single dense line or poorly indented markup. The formatter adds meaningful whitespace so you can quickly understand the document structure.
All formatting runs entirely in your browser using the browser's native DOMParser engine. For production deployments, the minification mode strips all unnecessary whitespace to reduce HTML file size.
Key Features of HTML Formatter
- Beautify and indent HTML code with consistent formatting
- Minify HTML to remove whitespace for production use
- Handles nested elements, attributes, and inline content
- Preserves content inside <pre>, <script>, and <style> tags
- Works with HTML fragments and complete HTML documents
- Works entirely in-browser — no server uploads
- One-click copy of formatted or minified output
- Configurable indentation (2-space or 4-space)
Examples
Beautify minified HTML from a template engine
Format a single-line HTML string from a server-side template for code review.
Input
<html><head><title>Page</title></head><body><h1>Hello</h1><p>World</p></body></html>
Output
<html>
<head>
<title>Page</title>
</head>
<body>
<h1>Hello</h1>
<p>World</p>
</body>
</html>Minify HTML for a landing page deployment
Remove all whitespace from a formatted HTML file before deploying to a CDN.
Input
Well-indented HTML page, ~150 lines
Output
Single-line minified HTML — ~30% smaller file size
Common Use Cases
- Formatting HTML from CMS templates or server-rendered pages for debugging
- Reviewing HTML structure in code reviews by making nesting levels visible
- Minifying HTML for production deployments to reduce page load size
- Cleaning up HTML copied from a browser DevTools inspector
- Formatting HTML snippets from third-party widgets or embed codes
- Preparing HTML for documentation or technical writing
Troubleshooting
Inline elements like <span> get placed on separate lines
Solution
HTML formatters typically place each element on its own line for clarity. This is expected formatting behavior.
Content inside <script> or <style> tags is mangled
Solution
Ensure your formatter recognizes <script> and <style> as raw text elements. If content is changed, format the JavaScript/CSS separately.
Self-closing tags like <br> cause formatting errors
Solution
HTML5 uses void elements (not self-closed), while XHTML uses <br/>. The formatter normalizes to HTML5 conventions.
Frequently Asked Questions
Does it validate HTML?
Basic formatting uses the browser DOMParser. Full W3C validation is not included. Use the W3C HTML Validator for compliance checking.
Can I format just a fragment of HTML?
Yes. The formatter handles both complete HTML documents and standalone fragments. You do not need to include <html>, <head>, or <body> tags.
Does it support HTML5 custom elements?
Yes. The browser's DOMParser accepts custom elements and treats them as valid unknown elements.
Can I minify HTML to reduce page size?
Yes. The minify mode removes all unnecessary whitespace from HTML while preserving content.
Does minifying HTML affect SEO?
No. Search engine crawlers parse the HTML DOM. Whitespace-only changes have no effect on how search engines read your content.
What indentation style is used?
The formatter uses 2-space indentation by default.
Is my code sent to a server?
No. All formatting is performed locally in your browser using the DOMParser API.
Will it break my HTML if I format then minify?
No. Both operations only affect whitespace. Elements, attributes, and content are identical before and after.