Paste your HTML, CSS, or JavaScript below and click Minify to strip whitespace, comments, and unnecessary characters. Works entirely in your browser — nothing is sent to a server.

HTML
CSS
JavaScript
No file chosen
Output
Related tools: SQL Formatter  |  JSON Formatter

How It Works

The tool runs entirely in your browser using pure JavaScript — your code is never uploaded anywhere.

LanguageWhat gets removed
HTMLComments, redundant whitespace, optional closing tags
CSSComments, whitespace, trailing semicolons, duplicate selectors
JavaScript// and /* */ comments, excess whitespace (string-safe)

The Beautify button does the reverse: it re-indents and formats your code for readability.

Tips

  • Upload a file directly using the Upload file button — the language tab switches automatically based on the file extension.
  • The size reduction percentage is calculated on UTF-8 byte length, matching what browsers and servers measure.
  • For JavaScript, whitespace inside string literals and template literals is preserved to avoid breaking your code.
  • Run minified code through Beautify first if you need to debug it.

Related tools: SQL Formatter  |  JSON Formatter