Is this based on a full parser?

No. It's a lightweight formatter that recognizes tag structure to indent code, and preserves the contents of script, style, and pre tags exactly as-is.

Can it still format invalid HTML?

It does its best to format the code even with syntax issues like unclosed tags, but for full validation, use the HTML5 Validator alongside it.

Is the code I enter sent to a server?

No. It's processed entirely in your browser.

Does it change my code?

Only whitespace and line breaks. Structure, attributes and text are unchanged.

Does HTML mixed with PHP work?

Template syntax can break tag-pair detection — use it on plain HTML.

🧽 HTML Code Formatter

Indents HTML code to match its tag structure.

Input

Result

How to use

Enter your HTML code.
Click "Format".
You'll see the code indented to match its tag structure.

🎯 Use Cases

Turn HTML squashed onto a single line into a readable form
Standardize formatting before a code review
Understand a template's code structure

Example

Input

<nav><a href="/">Home</a></nav>

Output

<nav>
  <a href="/">
    Home
  </a>
</nav>

A single-line HTML snippet is re-indented with 2 spaces to reflect its tag nesting, while the text and the href="/" attribute are preserved unchanged.

What the formatter does — and its limits

It indents and breaks lines according to tag nesting. Tag names, attributes and content are left untouched.

Item	Details
Indentation	Applied per nesting depth
Line breaks	Split at block-level tags
Preserved	Tag names, attributes and text stay as-is
Limits	A lightweight tidier — code mixed with PHP or template syntax may confuse tag pairing

FAQ

Is this based on a full parser?: No. It's a lightweight formatter that recognizes tag structure to indent code, and preserves the contents of script, style, and pre tags exactly as-is.
Can it still format invalid HTML?: It does its best to format the code even with syntax issues like unclosed tags, but for full validation, use the HTML5 Validator alongside it.
Is the code I enter sent to a server?: No. It's processed entirely in your browser.
Does it change my code?: Only whitespace and line breaks. Structure, attributes and text are unchanged.
Does HTML mixed with PHP work?: Template syntax can break tag-pair detection — use it on plain HTML.