HTML Formatter & Beautifier

Format, indent, and unminify messy HTML templates and DOM structures instantly

Why Use Our Online HTML Beautifier?

Extracting code from page sources or dealing with compiled templates often leaves you with dense, unreadable DOM structures. Our HTML formatter online instantly reorganizes tags and scripts, saving you hours of manual debugging.

Optimization Feature	Technical Action	Developer Benefit
Unminify HTML Code	Parses single-line DOM strings and injects logical line breaks between block elements.	Allows you to pretty print HTML templates effortlessly.
Smart Tag Indentation	Automatically aligns nested tags (e.g., `<div>` inside `<section>`) using your preferred spacing.	Makes it easy to scan and clean up messy HTML tags.
Inline JS & CSS Formatting	Detects `<script>` and `<style>` blocks and applies specific JS/CSS formatting rules inside them.	Formats entire web pages holistically, not just the markup.
Secure Local Execution	Runs the formatting engine 100% inside your web browser.	Zero server uploads ensure your proprietary templates stay private.

Live Examples: Unminify & Format HTML Online

Watch how our tool transforms dense, compiled blocks into perfectly readable markup.

Example 1: Unminify Production HTML

When you view a production site's source code, it's often minified into a single line. Click below to expand and indent the DOM tree.

Minified Input

<html><head><title>My App</title></head><body><div class="container">...</div></body></html>

→

Formatted Output

<html>
    <head>
        <title>My App</title>
    </head>
    <body>
        <div class="container">
            <header>
                <h1>Welcome</h1>
            </header>
            <main>
                <p>This is minified.</p>
            </main>
        </div>
    </body>
</html>

Example 2: Formatting Inline Scripts

Standard XML formatters destroy inline JavaScript. Our HTML beautifier intelligently applies JS formatting rules inside script tags.

Compressed Mixed Input

<div><script>function hello(){console.log("world");if(true){alert("yes");}}</script></div>

→

Structured Mixed Output

<div>
    <script>
        function hello() {
            console.log("world");
            if (true) {
                alert("yes");
            }
        }
    </script>
</div>

Frequently Asked Questions

What is an online HTML formatter?

An online HTML formatter (also known as an HTML beautifier) is a tool that takes compressed, minified, or messy HTML code and applies proper indentation, line breaks, and structural hierarchy. This process makes complex DOM trees readable and easy to debug for web developers.

How to unminify HTML code securely?

To unminify HTML code securely, simply paste your minified template into our editor. Our system uses a client-side JavaScript engine to instantly pretty print the HTML tags. Because the formatting runs 100% inside your web browser locally, your proprietary website layouts are never uploaded to our servers.

Does this HTML beautifier format inline CSS and JavaScript?

Yes! Unlike basic XML indenters, our advanced HTML beautifier intelligently detects <style> and <script> tags. It applies specific formatting syntax to internal CSS stylesheets and inline JavaScript functions, ensuring the entire web document is perfectly structured.