Flexbox Layout Generator
Design flexbox layouts with visual controls and copy the generated CSS for any container.
About Flexbox Layout Generator
Flexbox is the workhorse for one-dimensional layouts — rows, columns, centering, and distributing items — but the interplay of direction, justification, and alignment trips up even experienced developers. This generator exposes those controls visually with a live preview, so you can experiment with combinations and copy CSS that actually does what you expect.
Set the flex direction, then tune justify-content and align-items along the main and cross axes. Toggle wrapping to control line breaking and adjust gap for consistent spacing. Options add flex-grow, flex-shrink, and basis so you can control how items size themselves as the container changes.
Front-end developers use it to build nav bars, toolbars, card rows, and the ever-present centered-content pattern, while designers check how different justify and align combinations behave before the CSS is written. Anyone maintaining existing layouts can paste a working combination back into a stylesheet instead of debugging from scratch.
How to Use
- Set flex direction, justify, and alignment.
- Toggle wrapping and adjust gap.
- Copy the generated flexbox CSS.
Example
Row direction, center justify, center align, wrap display: flex; justify-content: center; align-items: center; flex-wrap: wrap;
Items flow in a row, centered on both axes, wrapping onto new lines when space runs out — the standard centered card layout.
FAQ
What's the difference between justify-content and align-items?
Justify-content aligns along the main axis (usually horizontal in a row); align-items aligns along the cross axis.
When should I use flexbox instead of grid?
Flexbox suits one-dimensional layouts (a row or a column); grid suits two-dimensional layouts where rows and columns matter together.
Can I control item sizing?
Yes, options add flex-grow, flex-shrink, and basis values so items expand or compress as the container changes size.
What is the difference between align-items and align-content?
align-items aligns items along the cross axis within a single line, while align-content distributes space between multiple lines when wrapping is enabled. If you only have one line, align-content has no effect, so align-items is the one you'll use most.
Why isn't my flex item shrinking when the container gets small?
By default flex items have flex-shrink set to 1, but their min-width often stops them from shrinking below their content size. Setting min-width: 0 on the item, or adjusting the flex-basis and shrink values, usually fixes it.