CSS Flexbox Generator
Design CSS Flexbox layouts visually — set direction, wrap, justify-content, align-items, and gap, then copy the CSS.
CSS Flexbox Generator creates display: flex CSS visually — flex-direction, flex-wrap, justify-content, align-items, align-content, and gap — with a live preview row of flex items, six ready-made presets, and one-click copy of the generated CSS. Runs entirely in your browser — no upload, no signup, no account. Made by FreeToolHub.
Layout
Alignment
Only visible with flex-wrap set to wrap or wrap-reverse and multiple lines of items.
Gap
Preview
CSS Output
display: flex;
flex-direction: row;
flex-wrap: nowrap;
justify-content: flex-start;
align-items: stretch;
gap: 16px;Quick Presets
Build CSS Flexbox layouts for navbars, toolbars, and card rows — set direction, wrapping, alignment, and gap, then copy the CSS.
Frequently Asked Questions
What is CSS Flexbox?
Flexbox is a one-dimensional CSS layout mode for arranging items in a row or a column, distributing space between them and aligning them within a container using display: flex.
What's the difference between justify-content and align-items?
justify-content aligns items along the main axis (horizontal in a row, vertical in a column); align-items aligns items along the cross axis (perpendicular to the main axis).
What does flex-wrap do?
flex-wrap: wrap allows items to move onto multiple lines when they don't fit on one, instead of shrinking or overflowing. When wrapping is on, align-content controls how those lines are spaced.
When does align-content apply?
align-content only has a visible effect when flex-wrap is set to wrap or wrap-reverse and there are multiple lines of items with extra space in the container.
Can I copy the generated CSS?
Yes. Click Copy CSS to copy the exact flex declaration — including flex-direction, flex-wrap, justify-content, align-items, and gap — to your clipboard, ready to paste into your stylesheet.
Does this tool store my settings or cost anything?
No. Everything runs locally in your browser; nothing is saved, uploaded, or sent to a server. The CSS Flexbox Generator is completely free with no sign-up, no account, and no limits.