# CSS Minifier

Compress CSS code

> Canonical page: https://elysiatools.com/en/tools/css-minifier

- **Category:** Development

- **Keywords:** css, minifier, compress, minify, optimize, clean

## Overview

The CSS Minifier is a high-performance tool designed to reduce the file size of your stylesheets by removing unnecessary whitespace, comments, and redundant code, ensuring faster load times for your web projects.

## Inputs

- **CSS Code** (textarea): Enter CSS code to minify...
- **Optimization Level** (select)
- **Remove Comments** (checkbox)
- **Remove Empty Rules** (checkbox)
- **Merge Media Queries** (checkbox)

## When to use

- Before deploying your website to production to improve page speed.
- When you need to reduce bandwidth usage for high-traffic web applications.
- To clean up messy or auto-generated CSS files for better maintainability.

## How it works

- Paste your raw CSS code into the input area.
- Select your preferred optimization level and toggle settings like comment removal or media query merging.
- Click the minify button to generate the compressed, production-ready CSS output.

## Use cases

- Optimizing large CSS frameworks for faster mobile page loading.
- Preparing production-ready stylesheets for web development projects.
- Cleaning up exported CSS from design tools before integrating into a codebase.

## Frequently asked questions

### What is CSS minification?

It is the process of removing unnecessary characters like spaces, line breaks, and comments from CSS files without changing their functionality.

### Does minification affect how my site looks?

No, minification only removes characters that the browser ignores, so your website's design and layout will remain exactly the same.

### Can I revert minified CSS to its original format?

Minification is a lossy process. While you can use a CSS beautifier to reformat the code, the original comments and specific formatting will not be recovered.

### What is the difference between Level 1 and Level 2 optimization?

Level 1 performs basic structural cleanup, while Level 2 applies advanced optimizations like merging rules and shorthand property conversion.

### Is it safe to merge media queries?

Yes, merging media queries reduces the number of blocks in your CSS, which can slightly improve parsing speed without impacting responsiveness.

## Related tools

- [Text Compressor](https://elysiatools.com/en/tools/text-compressor): Compress text by removing extra spaces, newlines, and unnecessary whitespace while preserving content structure
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- [HTML Minifier](https://elysiatools.com/en/tools/html-minifier): Compress HTML by removing comments, collapsing whitespace and minifying inline CSS/JS
- [PDF Optimize Advanced](https://elysiatools.com/en/tools/pdf-optimize-advanced): Advanced PDF optimization: remove metadata, clean structure, and recompress content
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- [SVG Minifier & Analyzer](https://elysiatools.com/en/tools/svg-minifier-analyzer): Analyze SVG markup, remove redundant elements, reduce payload size, compare before and after visually, and export cleaned files

## Samples

- [Code Comment Samples](https://elysiatools.com/en/samples/code-comment-samples): Sample code files with various comment styles for testing comment removal
- [Android Image Processing Java Samples](https://elysiatools.com/en/samples/android-image-processing-java): Android Java image processing examples including reading/saving images, scaling, and format conversion
- [Android Image Processing Kotlin Samples](https://elysiatools.com/en/samples/android-image-processing-kotlin): Android Kotlin image processing examples including reading/saving images, scaling, and format conversion
- [Web Image Processing Python Samples](https://elysiatools.com/en/samples/web-image-processing-python): Web Python image processing examples using PIL/Pillow including reading, saving, resizing, and format conversion

## Related content

- [Code Minify, Beautify, and Format Tools](https://elysiatools.com/en/hubs/code-minify-beautify-format-tools): Prepare code and markup for review or delivery with readable formatting, compact output, and preservation checks.
- [CSS Authoring, Layout, and Cascade Workflows](https://elysiatools.com/en/hubs/css-authoring-layout-and-cascade-workflows): Write and review CSS with readable formatting, selector diagnostics, responsive snippets, visual effects, and rendered-intent checks.