Flexbox generator. Create flexbox layouts visually with direction, alignment, wrapping, and item property controls.
100% browser-based — your data never leaves your device
Create flexbox layouts visually with alignment, direction, and wrapping controls.
.flex-container {
display: flex;
flex-direction: row;
justify-content: center;
align-items: center;
flex-wrap: nowrap;
gap: 8px;
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Flexbox is powerful and unintuitive in equal measure, mostly because its alignment depends on axes that shift with direction. This generator makes the axes visible:
Flexbox solves one-dimensional layout problems that appear in nearly every interface: centering content, distributing a navigation bar, and keeping a row of cards at equal height. Developers building navigation bars and toolbars, teams assembling card rows with flexible item sizing, and anyone who has ever struggled to vertically center a div will find the visual editor removes the trial-and-error.
The container controls cover direction, main and cross axis alignment, wrapping, and gap, which handles the majority of layout puzzles. The per-item controls are where the tool earns its keep for advanced work, letting you give individual items custom grow, shrink, basis, and align-self behavior so one item can break rank with the group. The live preview reflects every change instantly, and the CSS export emits both the container and item rules, ready to paste. Because the preview is a faithful model of the flex layout algorithm, what you see is what you will get in the browser.
Component layouts in progress are frequently part of products that have not been announced, and the arrangement of their interface is the product. Sending flexbox experiments to a server-side builder leaves a record of your interface decisions outside your control.
This generator computes every layout locally in your browser. The container and item properties you configure produce CSS on your device alone, so prototypes of unreleased components and their alignment logic never leave your machine.
Configure flex-direction, justify-content, align-items, flex-wrap, and gap using the visual controls.
Set per-item flex-grow, flex-shrink, flex-basis, and align-self values for precise control.
Once satisfied, copy the generated CSS for both the flex container and its items.
Practical examples to help you get the most out of Flexbox Generator:
display: flex; justify-content: center; align-items: center; height: 100vh; Perfectly centers any child element both horizontally and vertically.
display: flex; justify-content: space-between; align-items: center; Creates a nav bar with logo on left, links on right, and vertically centered items.
Remember: justify-content controls the main axis (direction of flex-flow), align-items controls the cross axis. If flex-direction is row, justify-content is horizontal.
When flex-wrap is enabled, items without a flex-basis or width can become too small. Set flex-basis or min-width to ensure items maintain readable sizes.
Flexbox is a one-dimensional layout system for distributing space and aligning items along a row or column. It excels at component-level layouts like navigation bars, card rows, and centering.
justify-content aligns items along the main axis (horizontal by default). align-items aligns items along the cross axis (vertical by default).
Yes. Each flex item can have custom flex-grow, flex-shrink, and flex-basis values, as well as individual align-self to override the container's alignment.
No. All flexbox generation and preview happens locally in your browser.
Configure flex-direction, justify-content, align-items, flex-wrap, and gap with sliders.
Set per-item flex-grow, flex-shrink, flex-basis, and align-self values.
See flexbox changes reflected instantly in the preview panel.
Copy the generated flexbox CSS for container and items.
Flexbox Generator is useful in a variety of scenarios across different workflows:
Centering content vertically and horizontally within a container
Building responsive navigation bars and toolbar layouts
Creating equal-height card rows with flexible item sizing
The most common Flexbox use case is centering items. Set display: flex, align-items: center, justify-content: center on the parent to perfectly center child content.
Enable flex-wrap to allow items to flow to the next line on small screens. Combine with flex-basis for responsive behavior without media queries.
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