CSS Minifier - Minify CSS Code Online

Quickly minify and compress your CSS code using our free online CSS Minifier. Reduce file size, remove unnecessary spaces, and improve your website's loading speed.

Tags: compress code css minify code scss

🚀 107,643 total conversions (1 this month)

Practice Python with coding challenges

Solve hands-on problems right in this editor: run the sample tests, submit, and get an AI code review.

All Python challenges
Easy

Average of Three

Average three whole numbers.

You'll learn ArithmeticDivision
BeginnerLearning-pathVariables
Easy

Rectangle Perimeter

Compute the perimeter of a rectangle from its sides.

You'll learn ArithmeticReturn values
BeginnerLearning-pathVariables
Medium

One Generation of a Genetic Algorithm

Breed the next generation of bit strings with tournament selection, single-point crossover and mutation.

You'll learn Genetic algorithmsEvolutionary search
OptimizationSimulationai
No solutions yet
Easy

Epsilon-Greedy Multi-Armed Bandit

Balance exploration and exploitation on a multi-armed bandit with epsilon-greedy action selection.

You'll learn Explore vs exploitBandits
Reinforcement learningaimachine learning
No solutions yet
Easy

Markov Chain State Distribution

Propagate a probability distribution through a Markov chain's transition matrix for a number of steps.

You'll learn Markov chainsProbability
Simulationaimath
No solutions yet
Medium

Value Iteration

Compute how valuable each state of a Markov decision process is by repeatedly applying the Bellman optimality update.

You'll learn Bellman equationMDPs
Reinforcement learningaimachine learning
No solutions yet
Medium

Q-Learning Updates

Apply the Q-learning update to a stream of experiences and watch rewards flow back to earlier states.

You'll learn Q-learningDiscounted rewards
Reinforcement learningaimachine learning
No solutions yet
Medium

Alpha-Beta Pruning

Evaluate a game tree with minimax and alpha-beta pruning, and count how many leaves the search really looks at.

You'll learn Alpha-beta pruningGame search
RecursionTreesai
No solutions yet
Medium

Minimax Tic-Tac-Toe

Pick the perfect tic-tac-toe move by searching the whole game tree with minimax.

You'll learn MinimaxGame trees
Recursionai
No solutions yet
Medium

A* Search on a Weighted Grid

Find the cheapest path across a grid of terrain costs with A*, the search algorithm behind game and robot pathfinding.

You'll learn A* searchHeuristics
GraphsGridsShortest-pathai
No solutions yet
Medium

Temperature and Top-K Sampling

Choose the next token like a language model does: keep the top k logits, apply temperature, and sample.

You'll learn Text generationSampling
aimachine learning
No solutions yet
Hard

Multi-Head Self-Attention

Project the input into queries, keys and values, run attention in several heads in parallel, and combine them.

You'll learn Multi-head attentionMatrix projections
aimachine learning
No solutions yet

Introduction

This online CSS minifier tool helps you compress and optimize your CSS code effortlessly. It’s ideal for improving website performance by reducing file size and load times.

How to Use This Tool

  1. Paste your CSS code directly into the editor or type it in.
  2. Click the Minify button to compress your CSS code.
  3. After minifying, you can:
    • Download the optimized result.
    • Save or share it using a unique link.
    • Sign in with Google or GitHub to save your minified code for future use.

What is CSS?

CSS (Cascading Style Sheets) is a language used to style web pages and user interfaces. It works with HTML to control the layout, colors, fonts, and overall visual presentation of a website or application.

CSS is not limited to web pages-it can also style XML-based documents like SVG and XUL. Combined with HTML and JavaScript, CSS plays a key role in building visually appealing and interactive websites and mobile applications.

Learn more about CSS from this CSS guide .

CSS Syntax

      
body {
    padding-left: 11em;
    font-family: Georgia, "Times New Roman", Times, serif;
    color: purple;
    background-color: #d8da3d
}

ul.navbar {
    position: absolute;
    top: 2em;
    left: 1em;
    width: 9em
}

h1 {
    font-family: Helvetica, Geneva, Arial, SunSans-Regular, sans-serif
}
      
    

What is Minification?

Minification is the process of minimizing code and markup in your web pages and script files. It’s one of the main methods used to reduce load times and bandwidth usage on websites. Minification dramatically improves site speed and accessibility, directly translating into a better user experience. It’s also beneficial to users accessing your website through a limited data plan and who would like to save on their bandwidth usage while surfing the web.

Why minify CSS?

When creating CSS developers tend to use spacing, comments and well-named variables to make code and markup readable for themselves. It also helps others who might later work on the assets. While this is a plus in the development phase, it becomes a negative when it comes to serving your pages. Web servers and browsers can parse file content without comments and well-structured code, both of which create additional network traffic without providing any functional benefit.

To minify CSS files, comments and extra spaces need to be removed, as well as crunch variable names so as to minimize code and reduce file size. The minified file version provides the same functionality while reducing the bandwidth of network requests.

Examples

Before minified

      
nav ul {
  margin: 0;
  padding: 0;
  list-style: none;
}
nav li {
  display: inline-block;
}
nav a {
  display: block;
  padding: 6px 12px;
  text-decoration: none;
}
      
    

After minified

      
nav ul{margin:0;padding:0;list-style:none;}nav li{display:inline-block;}nav a{display:block;padding:6px 12px;text-decoration:none;}