What does this tool do?
The CSS Flexbox Generator lets you visually set flex-direction, flex-wrap, justify-content, align-items and gap, then watch a live preview rearrange instantly. It is ideal for designers and developers who want to learn flexbox by experimenting instead of memorizing every property combination.
How to use it
- Adjust the values and options.
- See the result in the live preview.
- Copy the generated CSS/code into your project.
How it works
Pick values from dropdowns for flex-direction (row, column and reverse variants), flex-wrap, justify-content (including space-between, space-around and space-evenly) and align-items. Use the sliders to set the gap from 0 to 40px and the number of preview items from 1 to 10. The numbered blocks at the top realign instantly, and the generated .flex-container rule below can be copied with a single click.
Practical use cases
To spread navbar links evenly across a row, try justify-content: space-between. To vertically center card content, combine flex-direction: column with align-items: center. When items should drop to a new line on narrow screens, choose flex-wrap: wrap. Because the preview reflects every change, you can find the right combination through quick trial and error rather than guesswork.
Frequently asked questions
What is the difference between justify-content and align-items?
justify-content aligns items along the main axis (horizontal when flex-direction is row), while align-items aligns them on the cross axis (vertical for row). Switching direction to column swaps which axis each one controls.
Does the generated code include styles for the flex items themselves?
No, the tool only outputs the .flex-container rule for the parent. The numbered blocks in the preview are illustrative; you can add per-item properties like flex-grow or flex-basis manually in your own code.
Is the gap property supported everywhere?
Yes, gap for flexbox is supported in all modern browsers (Chrome, Firefox, Safari, Edge) and gives much cleaner spacing than using margins on each child.
Is CSS Flexbox Generator free?
Yes. CSS Flexbox Generator and all 300+ tools on MagmaNex are completely free with no signup or account required.
Is my data safe?
Yes. Everything runs locally in your browser. The data you enter is never sent to a server, stored, or shared.
Does it work on mobile?
Yes. CSS Flexbox Generator works on phones, tablets and desktops — no app download needed.
🔒 Privacy: everything runs in your browser, your data is never sent to a server.