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Code minifier

Minify and beautify CSS, HTML, and JavaScript.

Everything happens locally in your browser. Nothing is uploaded.
Processing Options
Choose your code type and operation
Input Code
Paste or upload your CSS code here
Minified Code
Click process to see results
Features
What this tool can do for each code type

CSS

  • • Remove comments and extra whitespace
  • • Compress property declarations
  • • Format with proper indentation
  • • Optimize for production deployment

HTML

  • • Remove HTML comments
  • • Compress whitespace between tags
  • • Add proper tag indentation
  • • Preserve content structure

JavaScript

  • • Remove comments and whitespace
  • • Compress variable declarations
  • • Format with proper indentation
  • • Maintain code functionality

A practical guide to Code minifier

Code Minifier removes unnecessary whitespace and applies supported syntax transformations to reduce HTML, CSS, or JavaScript payloads. Validation and runtime tests are essential before deployment.

Example: reduce a small production script

Keep the original in source control, minify with conservative options, compare file size, and run the real application test suite.

Task-specific steps

  1. 1

    Select the correct language and confirm the source parses and passes its tests before changing representation.

  2. 2

    Choose conservative minification options, preserving comments or names required by licenses, debugging, or runtime reflection.

  3. 3

    Minify, inspect warnings and size savings, then run the resulting artifact in the complete target environment.

Options that affect the result

  • Whitespace and comment removal provide low-risk savings when syntax is understood correctly.
  • More aggressive transforms can rename symbols or rewrite expressions for additional size reduction.

Limitations to know first

  • Dynamic evaluation, reflection, fragile semicolon assumptions, template syntax, and legacy environments can break under aggressive transforms.
  • Minification is not encryption and does not protect secrets placed in client-side source code.

Questions specific to this task

Does minifying JavaScript make it secure?

No. Browsers must receive executable code, and determined users can inspect or reformat it. Never embed secrets.

Why did minified code stop working?

The source may rely on names, comments, evaluation, implicit semicolons, or unsupported syntax transformations. Reduce options and test each change.