HTML Beautifier

HTML Beautifier

This HTML Beautifier takes raw, minified, or poorly indented HTML and reformats it with consistent indentation, proper nesting, and clean line breaks. It makes dense HTML markup readable and easier to debug.

The beautification runs entirely in your browser using the js-beautify library. Your HTML code never leaves your device, making it ideal for formatting templates, email HTML, scraped content, or any markup that needs cleanup.

How to use

1. Paste your raw or minified HTML into the input editor.
2. Click Beautify HTML to apply indentation and structure.
3. View the formatted HTML in the output editor with proper nesting.
4. Use Copy for the clipboard, Download for a .html file, or Clear to reset both editors.

What is HTML beautification?

HTML beautification is the process of reformatting HTML markup to follow consistent indentation and line-break rules. It takes compressed or messy HTML and adds proper spacing so the document structure is visually clear through nesting levels.

Well-formatted HTML is essential for debugging layout issues, code reviews, and maintaining templates over time. Beautified HTML also helps developers understand the DOM hierarchy at a glance without relying on browser developer tools.

Input notes

The tool accepts any HTML input, whether it is a full document or a fragment. It preserves all tags, attributes, and content while reformatting the structure. Self-closing tags and void elements are handled correctly.

Example

Minified HTML becomes readable after beautification:

--- Input (minified) ---
<div class="card"><h2>Title</h2><p>Description text</p><a href="/link">Read more</a></div>

--- Output (beautified) ---
<div class="card">
  <h2>Title</h2>
  <p>Description text</p>
  <a href="/link">Read more</a>
</div>

MCP integration

MCP (Model Context Protocol) lets AI agents and apps discover and run Coding.Tools utilities for repeatable conversions, formatting, hashing, and generation workflows.

MCP tool name: html-beautifier

MCP endpoint: https://coding.tools/mcp

Call tools/list first. Each tool entry includes inputSchema, outputSchema, and examples so an AI agent or client can build valid arguments without guessing.

For tools/call, read result.content[0].text for the display value and result.structuredContent for machine parsing. Tool-level failures return isError: true; protocol failures return a JSON-RPC error.

Example tools/call request:

curl -s https://coding.tools/mcp \
  -H "Content-Type: application/json" \
  -H "Accept: application/json" \
  -H "MCP-Protocol-Version: 2025-06-18" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"html-beautifier","arguments":{"input":"<section><h1>Docs</h1><p>MCP ready</p></section>"}}}'

Most text and data tools accept an input string plus optional options. Browser-only image tools are listed for discovery and return a web UI link when they need browser image APIs.