CSS Minifier

About the CSS minifier

Minifying a stylesheet removes everything that is only there for humans and rewrites values in their shortest equivalent form. The result renders exactly like the original but is smaller.

Rules applied

• Remove whitespace, indentation and line breaks.
• Strip comments (optionally keeping /*! ... */ comments).
• Remove the last semicolon of a block and empty rule sets.
• Remove the unit of zero lengths.
• Remove leading zero of decimals and trailing zeros.
• Convert rgb() with integer components to hexadecimal.
• Shorten six-digit hex colors when possible.
• Replace none by 0 for border and outline.
• Collapse repeated shorthand values.
• Normalize ! important.

What is left untouched

• Content of strings and url() is copied byte-for-byte.
• Spaces inside calc(), min(), max() and clamp() are kept.
• Custom properties (--name) keep their case.
• Declarations are never reordered or deduplicated.