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HTML Formatter

Code

Format and minify HTML with configurable indentation

Paste single-line or minified HTML and get it reformatted with proper indentation for debugging, with a configurable indent size (2 or 4 spaces) to match your project's existing style, or run it the other direction and strip whitespace and comments before shipping to production to shave a few KB off page weight. It reformats structure but doesn't perform full HTML5 spec validation, so a strict compliance check still needs the W3C validator or a build-pipeline linter. The parser is tolerant, similar to what browsers use internally, so it does its best with malformed markup, but badly mismatched tags can produce output that doesn't match your intent, so it's worth fixing structural errors first if the result looks off. Embedded `<script>` and `<style>` content is preserved as-is rather than reformatted, and minification is meant to be safe, though whitespace-sensitive edge cases like `<pre>` blocks are worth spot-checking.

htmlformatminifybeautify

How to use HTML Formatter

  • 1.Paste minified or single-line HTML to get it reformatted with proper indentation for readability during debugging.
  • 2.Use minify mode to strip whitespace and comments before shipping HTML to production to shave a few KB off page weight.
  • 3.Set a custom indent size (2 or 4 spaces) to match your project's existing code style before pasting formatted output back into your editor.

Frequently asked questions

Is my HTML sent to a server?
No, formatting and minification run entirely in your browser.
Does it validate my HTML, or just format it?
It reformats indentation and structure but doesn't perform full HTML5 spec validation — for strict validation, use the W3C validator or a linter in your build pipeline.
Will minifying break inline scripts or styles?
Whitespace removal is applied to HTML structure; embedded `<script>` and `<style>` content is preserved as-is, but you should still test the output rather than assume it's byte-identical behavior.
Can it handle malformed HTML with unclosed tags?
It uses a tolerant parser similar to what browsers use, so it will do its best with malformed markup, but the output may not match your intent if tags are badly mismatched — fix structural errors first for reliable results.

Use via API, SDK, or MCP

Installnpm install @utilix-tech/sdk
Usageimport { code } from '@utilix-tech/sdk'
const formatted = code.formatHtml('<div><p>Hello <strong>world</strong></p></div>')
console.log(formatted.output)

Runs locally · no API key · no rate limits · Node.js SDK docs →