CSS Minifier
Minify any CSS code to reduce file size for production.
CSS minification tool
Minify, inspect, and copy CSS
Paste CSS on the left, minify it, and copy compact output for quick frontend workflows.
Paste readable, messy, or copied CSS here.
Minified CSS output
Minified CSS is ready to copy.
Size saved
114
Characters saved compared with the original input.
Size saved
114
Characters removed from the original CSS.
Input size
401
Characters in the original CSS.
Output size
287
Characters in the minified CSS.
Character reduction
-114
Difference between input and output length.
Line reduction
-27
Number of lines removed from the output.
Compression
28%
Status: Minified
Copy minified CSS
Copy compact CSS for quick testing, snippets, or frontend performance checks.
Download minified CSS
For larger projects, prefer your build pipeline, but quick downloads are useful for small snippets.
Privacy note
The minifier runs locally in your browser and does not require an external API.
Accuracy note
This tool performs safe lightweight minification, but it does not replace a full production build pipeline.
Reset or try example
Load sample CSS or clear the editor to start fresh.
Safe minification note
Strings, URLs, custom properties, media queries, and keyframes are preserved where possible.
Minification options
Keep options compact and focused on safe CSS compression.
Safe minification only
This tool removes comments and whitespace conservatively. It does not rewrite selectors, merge rules, remove unused CSS, or perform advanced production optimization.
Practical CSS minification examples
Common CSS patterns that can be compressed safely.
Simple CSS minification
Before
body {
margin: 0;
color: #111;
}After
body{margin:0;color:#111}Media query minification
Before
@media (max-width: 640px) {
.card { padding: 12px; }
}After
@media(max-width:640px){.card{padding:12px}}Keyframes minification
Before
@keyframes fadeIn {
from { opacity: 0; }
to { opacity: 1; }
}After
@keyframes fadeIn{from{opacity:0}to{opacity:1}}Custom properties
Before
:root {
--color-primary: #2563eb;
--space-md: 1rem;
}After
:root{--color-primary:#2563eb;--space-md:1rem}CSS minification quick reference
Whitespace
Safe to remove in many places between CSS tokens.
Comments
Usually removed for production, except important license comments if needed.
Media queries
Can be minified while preserving behaviour.
Custom properties
Values should be preserved carefully.
Strings and URLs
Should not be damaged by simple whitespace removal.
Build tools
Recommended for large production projects.
Developer guide
Minify CSS for smaller frontend snippets
CSS minification helps reduce file size, but it is one part of a broader frontend performance workflow.
What is a CSS Minifier?
A CSS Minifier compresses CSS by removing unnecessary whitespace, line breaks, and comments while keeping the stylesheet behaviour the same where possible.
When should developers use it?
Use it when preparing CSS snippets for production, testing size savings, reducing stylesheet size, cleaning copied CSS, or compressing code outside a full build workflow.
CSS minify vs CSS format
Minify reduces file size and removes unnecessary formatting. Format or beautify improves readability. Both are useful at different stages of development.
CSS minification and performance
Smaller CSS can reduce transfer size. Compression such as gzip or Brotli, caching, critical CSS, unused CSS removal, and bundling may matter more for large sites.
Common CSS minification mistakes
How to use this CSS Minifier
- 1Paste your CSS into the input box.
- 2Choose whether to remove comments or preserve important comments.
- 3Click Minify CSS or enable auto-minify.
- 4Review the size savings and minified output.
- 5Copy the result for use in your project.
Why developers use a CSS Minifier
CSS Minifier FAQs
It compresses CSS by removing unnecessary whitespace, line breaks, and comments while preserving the stylesheet’s behaviour where possible.
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