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HTML Formatter

Format and beautify HTML code.

How to Use HTML Formatter

1

Paste your HTML markup into the input area, or drop in a saved .html or .php template file.

2

Choose an indent width of 2 or 4 spaces and decide whether inline tags stay on one line.

3

Click the "Process" button to re-indent the markup and normalise whitespace between block elements.

4

Copy the cleaned markup or download it, then render the page in a browser to confirm nothing shifted.

Features

Re-indents nested tags using your chosen 2 or 4 space width
Keeps inline elements such as span, a, and strong on the same line as their text
Leaves the contents of pre, textarea, script, and style blocks untouched
Handles inline SVG and self-closing tags without corrupting attributes
Preserves comments and indents them alongside the code they describe
Runs in the browser so unpublished templates and client work stay private

Frequently Asked Questions

Yes, it is free, requires no account, and processes the markup locally in your browser. Nothing is transmitted to a server, so proprietary templates never leave your machine.
Usually not, because HTML collapses runs of whitespace into a single space. The exception is a pair of inline-block or inline-flex elements that sit next to each other with no whitespace between them, since a formatter may insert a space. Check those specific spots after formatting.
Yes. Attribute values and namespaces are treated as opaque text, so inline SVG paths and custom elements such as my-widget survive unchanged. Self-closing syntax is preserved in the style you provided it.
No. The formatter re-indents what you give it and does not restructure your document, so unbalanced tags are reported or passed through rather than silently repaired. Fixing invalid nesting is a separate concern that could change the DOM your browser builds.

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About HTML Formatter

Template files that grow without structure are miserable to review. Markup written by a CMS export, a design tool, or a hurried afternoon ends up with divs nested eight levels deep on a single 600-character line, and nobody can tell where a section ends. The HTML Formatter rebuilds the indentation so the nesting depth is visible at a glance.

It walks the tag tree and re-emits it with each block-level element on its own line, indented according to how deeply it is nested. Inline elements such as span, a, strong, and em stay on the same line as the text they wrap, because breaking them would inject visible gaps into the rendered page.

Content that is whitespace sensitive is left exactly as authored. That includes pre, textarea, script, and style blocks, plus inline SVG where attribute formatting matters. Comments are preserved and indented with the code they document, so your section markers stay useful after formatting.

When to Use This Tool

  • Cleaning up a template before opening a pull request so reviewers can follow it
  • Un-indenting markup from a CMS export or an email builder
  • Finding the true nesting depth of a deeply nested layout
  • Formatting email HTML where whitespace and inline styles are delicate
  • Reformatting an HTML fragment that a minifier flattened into one line