HTML Formatter – Semantic Markup Beautifier

Transform HTML templates into clean, accessible markup that aligns with your project standards.

Input

Formatted Output

Formatting Options

Line width

Indent width

Use tabsEnable

Use single quotesEnable

One attribute per lineEnable

Examples

Basic HTML

<div><p>Hello World</p></div>

Form elements

<form><input type="text" name="name"><button>Submit</button></form>

How does the HTML Formatter work?

Prettier parses your markup into a DOM-like tree, then rewrites each node according to the options you choose. Block elements inherit proper indentation, redundant whitespace is removed, and attribute order is preserved.

The formatter loads only the required plugins to stay responsive on large templates. When something is malformed you get a precise, human-readable error so fixes are immediate.

What is HTML and why does formatting matter?

HTML (HyperText Markup Language) defines the structure of every web page. Browsers and assistive technologies rely on clean markup to present content correctly and accessibly.

Poorly formatted HTML obscures semantics, hurts SEO, and slows code reviews. Consistent formatting clarifies component boundaries and keeps design systems reusable.

Professional scenarios and tips

Hook the formatter into pre-commit scripts or CMS workflows to catch template issues before they surface to end users.

Run HTML through the tool prior to Lighthouse or accessibility audits so reports highlight real issues instead of formatting noise.

Frequently Asked Questions

Does it support inline CSS or JavaScript?

Yes. Prettier processes style and script blocks with dedicated parsers, so embedded code remains intact while the surrounding markup is tidied.

Is table-heavy email markup safe to format?

The formatter respects table layouts, but choose line width and attribute options carefully to stay within email client constraints.

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