HTML Minifier

Compress HTML snippets or documents into smaller markup in your browser.

Input
Output
0 characters 0 lines

What does HTML Minifier do?

HTML Minifier removes comments and unnecessary whitespace from HTML for smaller markup.

  • Primary use: HTML Minifier removes comments and unnecessary whitespace from HTML for smaller markup.
  • Key technical fact: HTML whitespace may affect inline layout, so minification should preserve text-rendering intent.
  • Practical check: Run the formatted or minified output through your parser, tests, or runtime when exact syntax behavior matters.
Topic Direct answer Source
Direct answer HTML Minifier removes comments and unnecessary whitespace from HTML for smaller markup. WHATWG HTML Standard
Key fact HTML whitespace may affect inline layout, so minification should preserve text-rendering intent. WHATWG HTML Standard
Processing model Runs locally in the browser; no production Node server receives the input. Browser JavaScript

Reduce HTML size without breaking layout

HTML Minifier removes avoidable whitespace and comments so markup is more compact. It is useful for snippets, static pages, email templates, examples, and generated HTML that needs a smaller text footprint.

HTML whitespace can affect inline layout, text rendering, <pre> content, and template syntax. Comments may also be meaningful for some frameworks or conditional markup, so verify output before shipping it.

How to use

  1. Paste your HTML code into the input editor.
  2. Click Minify HTML to remove avoidable formatting and comments.
  3. Review the minified output for preserved text, inline spacing, and template markers.
  4. Use Copy for the clipboard, Download for a file, or Clear to reset.

What is HTML Minifier?

HTML Minifier is a browser-based utility for producing compact HTML. It reduces transfer or storage size by trimming characters that usually do not affect how the document is parsed.

Minification is not the same as validating HTML. If the source is malformed, browser error recovery may still apply, and the safest check is to render or test the minified result in the target environment.

Input notes

Avoid minifying markup where exact whitespace is required, such as preformatted text, text-only email sections, or framework comments. Keep a readable source copy for future edits.

Example

Comments and indentation are removed from a simple document:

--- Formatted Input ---
<!-- Page title -->
<html>
  <head>
    <title>Test</title>
  </head>
</html>

--- Minified Output ---
<html><head><title>Test</title></head></html>

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-minifier

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-minifier","arguments":{"input":"<section>\n  <h1>Docs</h1>\n  <p>MCP ready</p>\n</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.