CSS Variables Generator

Build CSS custom properties for design systems

🔒 Files never leave your browser
Presets: 
 
  
 
  
   
 

How to Use CSS Variables Generator 
 
 
  
Add variables
 
Add variable names and values with the color picker.
 
  
Or use preset
 
Load a preset theme (Dark, Light, Material, Tailwind).
 
  
Export
 
Copy the CSS or download as a .css file.
 
 
 
  
 

Why Choose AllTools CSS Variables Generator?

 
     
  •  ✓ Dynamic variable rows 
  •  ✓ 4 theme presets 
  •  ✓ Color picker 
  •  ✓ Auto -- prefix 
  •  ✓ Copy CSS 
  •  ✓ Download .css file 
    •  
 
  
 

Why Use This Tool

 
     
  •  ★ Quickly scaffold a CSS custom properties design system 
  •  ★ Visual color picker for color token values 
  •  ★ Preset themes give you a starting point for common setups 
  •  ★ Download ready-to-use .css files for your project 
    •  
 
  
 
 
 CSS Custom Properties for Design Systems 
 
 
CSS custom properties (variables) are the foundation of modern design systems. Defined in :root, they provide a single source of truth for colors, spacing, typography, and other design tokens. Changing one variable updates every element that references it — enabling theme switching, dark mode, and consistent styling across components. This generator helps you define variables visually and export clean CSS.
 
 
 
  
 

Related Resources

 
  Convert color formats →
 Generate CSS gradients →
 Generate box shadows →
 
 
  
 

Frequently Asked Questions

 
 
  What are CSS custom properties? 
▼
  
 CSS custom properties (variables) let you define reusable values with --name: value syntax in :root. Use them with var(--name) anywhere in your CSS. 
 
  Which browsers support CSS variables? 
▼
  
 All modern browsers (Chrome, Firefox, Safari, Edge) support CSS custom properties. IE11 does not. 
 
  Does this work on mobile? 
▼
  
 Yes. All AllTools tools are fully responsive and work on phones and tablets. 
 
 
 
 
  
     
 

Related Tools

 
 
        
Dev
Color Converter HEX/RGB/HSL
Convert colors between HEX, RGB, HSL, and CMYK with live preview

Instant

Private

     
CSS
CSS Gradient Generator
Create CSS gradients with live preview and presets

Instant

Private

    
CSS
CSS Animation Generator
Generate CSS animations — bounce, fade, slide

Instant

Private

        
CSS
Tailwind Color Reference
Tailwind CSS color palette — click to copy HEX

Instant

Private

    
CSS
Border Radius Generator
Create CSS border-radius with live preview

Instant

Private