Is my HTML sent to a server?

No. All formatting is done entirely in your browser using JavaScript. Nothing is transmitted to any server and your code never leaves your device.

What are void elements and why does the XHTML self-close option matter?

Void elements are HTML tags that cannot have children, such as , , , , and . In standard HTML5 the closing slash is optional ( is valid), but XHTML and some XML-based templates require the self-closing form ( ). The toggle lets you choose whichever style your project requires.

How does the inline CSS and JavaScript formatting work?

When those options are enabled the formatter applies basic re-indentation inside and blocks — adding a consistent indent level, normalizing semicolons, and fixing brace placement. It is intentionally simple; for complex scripts use a dedicated JS/CSS formatter afterward.

What does "Wrap attributes" do?

When a tag's opening line would exceed the configured max line length, each attribute is placed on its own indented line. This is especially helpful for long tags or component elements with many data attributes.

HTML Formatter / Beautifier

Name: HTML Formatter / Beautifier
Availability: InStock
Author: Nham Vu

Paste minified or messy HTML, configure indentation and formatting options, and get clean, readable output instantly in your browser.

HTML Input

Paste HTML here

Formatting Options

Indent style

Max line length

Preserve comments Lowercase tag names Format inline CSS Format inline JS (basic) Wrap attributes on long tags

Void element style

Formatted HTML

Paste HTML on the left and click Format HTML.

Summary

Paste minified or messy HTML, configure indentation and formatting options, and get clean, readable output instantly in your browser.

How it works

Paste your HTML into the input textarea on the left.
Choose your preferred indent style and configure formatting options.
Click Format HTML to process the input.
Review the formatted output on the right, check the line and byte counts.
Click Copy to copy the formatted HTML to your clipboard.

Use cases

Unminify production or third-party HTML for debugging and readability.
Standardize indentation across HTML templates before committing to source control.
Quickly pretty-print pasted HTML snippets from browser DevTools or documentation.
Inspect inline script and style blocks after minification strips formatting.

Frequently Asked Questions

Last updated: 2026-06-09 · Reviewed by Nham Vu