Can I combine multiple conditions?

Yes. Supports AND/OR logic, e.g. @container (min-width: 400px) and (max-width: 800px).

Free CSS Container Query Builder

Q: What container types are supported?

inline-size (default, width-based), size (width+height), and normal (no query container).

What can CSS Container Query Builder do?

CSS Container Query Builder is a pure frontend tool for visually building @container query rules. Configure container name, type, query conditions and inner styles through a form interface. The tool generates standard CSS container query code with live preview — drag the slider to see style changes at different container widths. Supports AND/OR condition combos covering min/max-width/height, aspect-ratio, orientation.

Core Features

Visual Config: Form-based container type and condition selection
Live Preview: Drag slider to see style switching in real-time
Multi-condition: AND/OR logic for combining query conditions
Full Query Features: min/max-width/height, aspect-ratio, orientation
One-click Generate: Complete CSS with container declaration and query rules

How to Use

Step 1: Set container name and type (inline-size/size).

Step 2: Add query conditions (e.g. min-width: 400px).

Step 3: Enter CSS styles to apply inside the container.

Step 4: Click "Generate CSS" or Ctrl+Enter to see code and preview.

Use Cases

Component-level Responsive

Make cards, sidebars adapt to their own container space, not viewport width.

Design Systems

Define container query rules for design system components ensuring correct display in any layout.

Layout Debugging

Quickly debug container query breakpoints with live preview.

Extended Knowledge

CSS Container Queries use @container rules. Declare container-type: inline-size on parent, optionally container-name. Query syntax is similar to media queries but based on container size. Core advantage: component-level responsive — same component auto-switches layout in wide vs narrow containers. Chrome 105+, Safari 16+, Firefox 110+ supported.

FAQ

What are CSS container queries?

CSS container queries (@container) allow styling based on parent container size rather than viewport.

Container queries vs media queries?

Media queries use viewport size; container queries use parent container size for component-level responsive design.

What container types are supported?

inline-size (width-based), size (width+height), and normal (no query container).

Browser compatibility?

Chrome 105+, Firefox 110+, Safari 16+ support container queries.

Is data uploaded?

No. All CSS generation is done locally in your browser.

Can I combine conditions?

Yes. Supports AND/OR logic for combining query conditions.

CSS Container Query Builder