CSS Container Query Generator
Container query options
Live preview
About CSS container queries
CSS container queries let components respond to the size of their parent container instead of the viewport. They are useful for cards, panels, widgets, sidebars, and reusable layout components.
This generator creates the container setup and the @container rule together, so you can quickly copy a complete responsive component pattern.
How to use this generator
- Choose a container type, usually inline-size for width-based component layouts.
- Set an optional container name if you want named container queries.
- Choose a min-width, max-width, min-height, or max-height condition.
- Enter the selector and CSS declaration that should apply inside the container query.
- Copy the generated CSS into your stylesheet.
Tips
- Use container queries when a component should adapt to its own available space.
- Use media queries when the layout depends on the whole viewport.
- Named containers are helpful when nested components have multiple possible query containers.
- Keep component selectors local and predictable, such as .card, .panel, or .product-card.
Container query checks before shipping a responsive component
Container queries make components respond to available space, but containment, query units, nesting, and fallback behavior still need explicit testing.
Choose the query container
Set container-type on the intended ancestor and use a stable container name when nested layouts could match the wrong element.
Test component contexts
Place the component in sidebars, grids, modals, cards, and full-width layouts to verify behavior depends on its container rather than the viewport.
Check query boundaries
Inspect values just below, at, and above each breakpoint and avoid gaps or overlaps between adjacent conditions.
Plan compatibility
Confirm browser support for size, style, and scroll-state queries and provide a usable baseline where newer features are unavailable.
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