Developer Layout Utility
Flexbox Playground
Test justify-content, align-items, flex-direction, flex-wrap, gap, and align-content in real time, then generate CSS code instantly.
Flexbox Settings
Configure the direction, alignment, wrapping, spacing, and item size of a Flex container.
Generated Result
CSS code generated from the current Flexbox settings.
Change the Flexbox settings and click the Generate CSS Code button.
Flexbox Alignment Comparison
Once you understand direction and axis concepts, Flexbox becomes useful for button groups, card lists, and navigation layouts.
Controls alignment along the main axis. In row direction it controls horizontal alignment, and in column direction it controls vertical alignment.
Controls alignment along the cross axis. Items can be placed at the start, center, end, or stretched.
Controls the alignment of multiple flex lines when flex-wrap creates more than one line.
Help
What is Flexbox Playground?
Flexbox Playground is a developer layout utility that lets you test Flexbox properties in real time and generate CSS code.
It is useful for building button groups, navigation bars, card lists, tag lists, form layouts, and admin dashboard UI.
Supported Features
- Configure flex-direction, justify-content, and align-items.
- Configure flex-wrap and align-content.
- Adjust gap, padding, and item count.
- Adjust item width, item height, and border-radius.
- Apply frequently used Flexbox presets.
- Preview layouts in real time, copy CSS code, or download it.
What is the difference between justify-content and align-items?
justify-content controls the main axis, while align-items controls the cross axis. The main and cross axis change depending on whether flex-direction is row or column.
When does align-content apply?
align-content works when flex-wrap creates multiple lines. If the layout has only one line, the visual difference may be minimal.
When should I use flex-wrap?
Use flex-wrap: wrap when there are many items or the screen width is narrow. It is often used for tag lists, card lists, and button groups.
When should I use Flexbox instead of CSS Grid?
Flexbox is strong for one-dimensional alignment and item flow, while CSS Grid is better for two-dimensional layouts with both rows and columns.
Can I use the generated CSS directly?
Yes, the generated code is basic Flexbox layout CSS. Before using it in a real project, also check parent width, responsive breakpoints, and item content length.