Flexbox generator
Tune a Flexbox container live and copy the ready-to-use CSS.
- Instant
- Free
- Private (processed locally)
- No sign-up
Master Flexbox without guesswork
Choose direction, alignment, wrapping and spacing: the preview updates live and the container CSS is ready to copy.
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Set the properties
direction, justify, align, wrap, gap.
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Watch the preview
Numbered items react live.
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Copy the CSS
Apply it to your container.
The container CSS
| Property | Role |
|---|---|
| display: flex | Enables Flexbox |
| flex-direction | Row or column |
| justify-content | Distribution (main axis) |
| align-items | Alignment (cross axis) |
| gap | Space between items |
The CSS applies to the parent; children position themselves. Everything is generated in your browser.
Frequently asked questions
What is Flexbox for?
Flexbox is a CSS layout mode to align and distribute items along a row or a column. It handles spacing, centering and wrapping automatically, which greatly simplifies responsive layouts.
What is the difference between justify-content and align-items?
justify-content distributes items along the main axis (horizontal in row), align-items aligns them on the cross axis (vertical in row). If you switch to column, both axes swap.
Does the generated CSS apply to the container or the items?
To the container. The properties (display: flex, justify-content, etc.) go on the parent; children position automatically. The preview shows numbered items to visualize the effect.
What does flex-wrap do?
By default (nowrap), items stay on a single line, shrinking if needed. With wrap, they move to the next line when space runs out — useful for fluid grids.