Transform minified or inconsistently indented HTML into clean, properly nested markup in one click. Supports all HTML5 elements and void tags. Runs entirely in your browser.
HTML that arrives in minified form — one long line stripped of all whitespace — is essentially unreadable to a human developer. An HTML Beautifier solves this by reconstructing the original indented structure. It parses each tag, tracks the nesting depth, and writes the output so that every child element is indented one level deeper than its parent.
Unlike a CSS or JavaScript formatter, an HTML beautifier must understand the DOM structure: block-level elements that can contain children, inline elements, and void elements that never have children (like <br>, <img>, <input>, and <meta>). ToolsVenue's formatter handles all of these correctly without miscounting depth or inserting phantom closing tags.
The tool supports all HTML5 semantic elements — <article>, <section>, <nav>, <aside>, <header>, <footer>, <main>, <figure>, and the rest — as well as custom data attributes, ARIA roles, and boolean attributes.
Copy your HTML
Whether from a template engine output, a bundled production page, or browser DevTools, copy the raw markup.
Paste it into the left panel
The character counter shows you exactly how much code you are working with.
Pick an indent style
Two spaces is the web standard; four spaces or tabs are fine if your project uses them.
Click Format
The output panel shows the indented result. Scroll through it to verify the structure, then click Copy.
HTML describes a hierarchical document tree. Every child element sits inside a parent, and the visual indentation of formatted HTML makes those relationships immediately clear. When you look at formatted markup, you can tell at a glance which <div> closes where, which <ul> contains which <li> elements, and where sibling elements begin and end.
This matters practically in several situations: debugging layout issues by tracing which container wraps a misbehaving element; conducting accessibility reviews to verify heading hierarchy and ARIA labeling; onboarding a new team member who needs to understand the page structure; and reviewing pull requests where the diff only makes sense with proper indentation.
Using a formatter also reduces the likelihood of introducing nesting errors when editing. When the structure is visually clear, it is much harder to accidentally close the wrong tag or leave one unclosed.
Void-Element Aware
Correctly handles all 13 HTML5 void elements without adding closing tags.
HTML5 Semantic Support
All modern semantic elements are parsed and indented correctly.
Browser-Only
Your markup never leaves your device — no uploads, no logs.
Fast
Processes entire page templates in milliseconds.
ARIA-Safe
ARIA attributes, roles, and data attributes are preserved without modification.
One-Click Copy
Copy the result to clipboard instantly for use in any editor.