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Formatted HTML appears here
Paste HTML and click Beautify — or enable Live format// format and indent HTML for maximum readability
Format and indent HTML instantly. Configurable indent size, attribute wrapping, inline vs block element control, and syntax-highlighted output — browser-based, free, no sign-up.
Formatted HTML appears here
Paste HTML and click Beautify — or enable Live formatPaste any HTML — a minified production file, a copied page source, a template snippet, or messy auto-generated markup. Fragments and full documents both work.
Choose indent size (2 spaces, 4 spaces, or tab), enable attribute wrapping for long tags, and set whether inline elements stay on the same line.
The syntax-highlighted output with line numbers appears on the right. Click Copy to grab the plain formatted HTML, or Download to save it as a .html file.
HTML Beautifier re-indents and formats HTML markup for human readability. It parses tag structure, applies consistent indentation, handles block vs inline elements correctly, and outputs syntax-highlighted HTML with line numbers — entirely in your browser, free and without uploading any data.
HTML beautification (also called pretty-printing or formatting) re-structures HTML source code with consistent indentation and line breaks to make it readable. Minified HTML has all unnecessary whitespace removed for compact delivery. Beautification reverses this — it adds back the whitespace that makes nesting relationships, attributes, and content easy to read and edit.
Block elements (<div>, <p>, <section>, <ul>, etc.) always start on a new line and take up full width. Inline elements (<span>, <a>, <strong>, <em>, etc.) flow within text and should not have extra line breaks added around them. When "Preserve inline elements" is enabled, inline elements stay on the same line as surrounding text to avoid unintended whitespace changes in the rendered output.
When an HTML tag has many attributes — common in modern JavaScript frameworks with data bindings, ARIA attributes, and class strings — the opening tag can become very long and hard to read. Attribute wrapping places each attribute on its own line, aligned with the first attribute, when the tag would exceed the configured column limit. This matches the Prettier HTML formatting style.
For block elements, no — adding whitespace and line breaks around <div>, <p>, and similar elements does not change how browsers render them. For inline elements, extra whitespace between tags can introduce visible gaps in the rendered output. This is why the "Preserve inline elements" option exists — it ensures <span>, <a>, and similar elements are not split onto separate lines.
This is a matter of team convention and personal preference. Two spaces are popular in front-end projects and are the default in many formatters. Four spaces are traditional in many back-end languages. Tabs allow each developer to set their own visual indent width in their editor while the source file uses a single character per level. Use whatever matches your project's .editorconfig or Prettier configuration.
The beautifier correctly identifies <style> and <script> blocks and preserves their content exactly as-is, without re-indenting or reformatting the code inside them. This avoids corrupting JavaScript logic or CSS rules that depend on specific formatting. For formatting the CSS or JavaScript inside those blocks, use the dedicated CSS Beautifier and JavaScript Formatter tools.
Reading minified HTML from a production site, auto-generated template output, or a pasted code snippet from a documentation page can be tedious. Compact, single-line HTML provides no visual indication of nesting, making it difficult to understand the structure of a component or find the element you need to edit. An HTML beautifier restores the human-readable form by adding consistent indentation and line breaks.
An HTML formatter parses the tag structure by tracking opening and closing tags and incrementing or decrementing an indentation counter. Block-level elements — those that create their own formatting context in the browser — start on a new line and their content is indented one level. Inline elements stay on the same line as surrounding content because they are part of the text flow. Void elements (self-closing tags like <br>, <img>, <input>) are emitted on their own line without a corresponding closing tag.
Modern HTML components — particularly those written for React, Vue, Angular, or Svelte — often have opening tags with a dozen or more attributes: class names, data bindings, event handlers, ARIA roles and labels, and custom properties. A single-line tag with twelve attributes is very hard to scan. Attribute wrapping places each attribute on its own line, indented to align with the tag's first attribute, making each attribute easy to read, edit, or add in version control diff views.
The distinction between inline and block elements is fundamental to HTML formatting. Block elements like <div>, <p>, <h1>–<h6>, <ul>, <section>, and <article> always appear on their own line in formatted output. Inline elements like <span>, <a>, <strong>, <em>, and <code> should not have extra line breaks inserted around them, because browsers render whitespace between inline elements as a small visible space that can affect layout.
The most common use case for a browser-based HTML beautifier is reading minified HTML from a live website. Viewing page source in a browser gives you the raw, often minified HTML. Pasting that source into this beautifier instantly reveals the document structure — which elements are nested inside which, how the navigation is structured, what class names a component uses, and whether there are any hidden elements or dynamic content placeholders. This is invaluable for debugging styling issues, understanding third-party widgets, or reverse-engineering layout structures.