What is an HTML formatter?

An HTML formatter (beautifier) transforms minified or messy HTML markup into readable, properly indented code. It places block-level elements on their own lines with proper indentation, preserves inline elements, and handles self-closing (void) elements correctly. This makes HTML easier to read, edit, and debug.

What is the difference between block and inline HTML elements?

Block elements (div, p, section, article, header, footer, ul, ol, table) start on a new line and take the full width. Inline elements (a, span, strong, em, b, i, code, img) flow within text without breaking the line. HTML formatters indent block elements on separate lines but keep inline elements on the same line as surrounding text.

What are void (self-closing) HTML elements?

Void elements cannot have children and do not need a closing tag. The 14 void elements are: area, base, br, col, embed, hr, img, input, link, meta, param, source, track, wbr. In HTML5, the trailing slash is optional: both and are valid. XHTML requires the self-closing slash: .

Does formatting HTML change how the page renders?

In most cases, no. Browsers collapse multiple whitespace characters into a single space in normal flow. However, whitespace IS significant inside , , and elements, and when CSS white-space is set to pre or pre-wrap. HTML formatters preserve content inside these raw elements to avoid rendering changes.

How do I minify HTML for production?

HTML minification removes unnecessary whitespace between tags, removes comments, and collapses text node whitespace. This reduces file size by 10-30%. For production builds, use html-minifier-terser (Node.js), HTMLMinifier (Python), or build tools like webpack/vite with HTML minification plugins. This online tool also supports one-click minification.

What indent size should I use for HTML?

2 spaces is the most common in modern web development (used by Google, Bootstrap, React, Vue projects). 4 spaces is common in enterprise environments. Tabs are preferred by some teams for accessibility. The key is consistency across your project. Configure your editor and formatter to use the same setting.

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HTML Formatter & Beautifier

An HTML formatter (beautifier) transforms minified or messy HTML into readable, properly indented markup. Block elements (div, p, section) get their own lines with child indentation. Inline elements (a, span, strong) stay inline. Void elements (br, img, input, meta) are self-closing. Minification removes whitespace between tags and collapses text nodes. <div><p>text</p></div> formats with each tag on its own indented line.

Format and beautify minified or messy HTML markup. Properly indents block elements, keeps inline elements inline, handles void elements and raw content (script, style, pre). Also minifies HTML by removing whitespace between tags. Shows tag count, line count, and size comparison.

Works OfflineDark ModeNo Ads

Presets

Mode

Indent:

Input

Output

HTML Formatting Reference

Element Type	Examples	Formatting Rule
Block elements	div, p, section, article	Each on its own line, children indented
Inline elements	a, span, strong, em	Kept inline with surrounding text
Void elements	br, hr, img, input, meta	Self-closing, no closing tag needed
Raw elements	script, style, pre	Content preserved as-is
Comments	<!-- ... -->	Preserved on own line
Text content	Any text node	Trimmed and placed on own line or inline

How to Use

1
Paste your HTML
Paste minified, messy, or unformatted HTML in the input panel. Or click a preset (Minified, Form, Table, Semantic) to load sample markup.
2
Choose format or minify mode
Select Format/Beautify to indent and organize tags, or Minify to compress by removing whitespace between tags.
3
Click Format or Minify
The formatted or minified HTML appears in the output panel. Statistics show tag count, line count, and size comparison.
4
Copy the result
Click Copy to copy the output to your clipboard. Paste into your HTML file or template.

Frequently Asked Questions

What is an HTML formatter?: An HTML formatter (beautifier) transforms minified or messy HTML markup into readable, properly indented code. It places block-level elements on their own lines with proper indentation, preserves inline elements, and handles self-closing (void) elements correctly. This makes HTML easier to read, edit, and debug.
What is the difference between block and inline HTML elements?: Block elements (div, p, section, article, header, footer, ul, ol, table) start on a new line and take the full width. Inline elements (a, span, strong, em, b, i, code, img) flow within text without breaking the line. HTML formatters indent block elements on separate lines but keep inline elements on the same line as surrounding text.
What are void (self-closing) HTML elements?: Void elements cannot have children and do not need a closing tag. The 14 void elements are: area, base, br, col, embed, hr, img, input, link, meta, param, source, track, wbr. In HTML5, the trailing slash is optional: both <br> and <br/> are valid. XHTML requires the self-closing slash: <br/>.
Does formatting HTML change how the page renders?: In most cases, no. Browsers collapse multiple whitespace characters into a single space in normal flow. However, whitespace IS significant inside <pre>, <code>, and <textarea> elements, and when CSS white-space is set to pre or pre-wrap. HTML formatters preserve content inside these raw elements to avoid rendering changes.
How do I minify HTML for production?: HTML minification removes unnecessary whitespace between tags, removes comments, and collapses text node whitespace. This reduces file size by 10-30%. For production builds, use html-minifier-terser (Node.js), HTMLMinifier (Python), or build tools like webpack/vite with HTML minification plugins. This online tool also supports one-click minification.
What indent size should I use for HTML?: 2 spaces is the most common in modern web development (used by Google, Bootstrap, React, Vue projects). 4 spaces is common in enterprise environments. Tabs are preferred by some teams for accessibility. The key is consistency across your project. Configure your editor and formatter to use the same setting.