Does minifying change how my page looks?

No — only comments and whitespace are removed; all selectors, properties and values remain identical.

Is my CSS uploaded anywhere?

No — minification happens entirely in your browser.

Does this rename classes or variables?

No — this minifier only removes comments and whitespace; class and custom-property names are left untouched.

How much smaller will my file be?

It depends on how much whitespace and how many comments the original had.

Can I reverse minification?

Yes — use the CSS Formatter tool to re-indent minified CSS (comments cannot be recovered, since they are removed).

Does this work on very large stylesheets?

Yes, limited only by your browser's available memory.

Outils JSON & Code

Minificateur CSS — Outil en Ligne Gratuit

Supprimez commentaires et espaces du CSS pour réduire sa taille.

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Your Text

What Is a CSS Minifier?

A CSS minifier strips comments and every unnecessary space, tab and line break from a stylesheet, producing a smaller file that parses to exactly the same styling rules.

Minifying CSS before deploying it to production reduces the number of bytes a browser needs to download, which can meaningfully speed up page load, especially on large stylesheets.

Qui Utilise Cet Outil ?

Pour les Entreprises

Reduce the size of a stylesheet before deploying it to production.

Pour un Usage Personnel

Shrink a CSS file for a personal website.

Pour les Étudiants

Compare formatted vs minified CSS for a web performance assignment.

Pour les Bureaux

Prepare a compact CSS file for an internal tool with strict size limits.

Pourquoi Utiliser Cet Outil

Fonctionnalités Clés

Comment & Whitespace Removal

Strips comments and every unnecessary space and line break.

Instant Minification

Output updates immediately as you paste in CSS.

100% Private

Your data is never uploaded — minification happens entirely in your browser.

One-Click Copy

Copy or download the minified result.

Le Résultat

Avantages

Faster Page Loads

Smaller CSS files download and parse faster.

Always Equivalent Styling

Minifying never changes which styles apply — only whitespace and comments are removed.

Nothing Uploaded

Safe for proprietary CSS, since nothing leaves your browser.

Étape par Étape

Comment Utiliser Minificateur CSS

Paste Formatted CSS

Add readable CSS with comments and indentation.

Read the Minified Result

A compact, whitespace-free version appears automatically.

Copy or Download It

Use the Copy or Download button to grab the result.

Spécifications

Détails Techniques

Détail	Valeur
Entrée	CSS stylesheets
Traitement	No practical limit — handled entirely by your browser
Sortie	Removes comments and unnecessary whitespace only — no property renaming

Vous Pouvez le Vérifier

Confidentialité & Sécurité

Ce qui se passe réellement avec votre fichier lorsque vous utilisez cet outil.

100% Client-Side

This tool runs entirely inside your browser using JavaScript — nothing you type or generate is ever sent anywhere.

No Upload, Ever

There is no file upload and no server processing step — your data never leaves your device.

Works Offline

Once this page has loaded, the tool keeps working even without an internet connection.

Nothing Stored

Nothing you enter is saved on our servers — refreshing the page clears everything.

No Tracking of Your Input

We have no way to see what you type, generate or convert with this tool.

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Astuces

Keep a Formatted Source File

Always keep the readable, commented source and minify only the deployed copy.

Combine with Gzip/Brotli on Your Server

Minification and server-side compression work well together for maximum size reduction.

Questions Fréquentes