CSS Flexbox Generator
Build CSS Flexbox layouts visually. Set direction, wrap, justify-content, align-items, gap. Per-item flex-grow, flex-shrink, order. Six presets.
Click an item to edit. Hover to remove.
display: flex; gap: 8px;
view_columnContainer
styleLayout Presets
What is the CSS Flexbox Generator?
A CSS Flexbox generator builds the display: flex container and per-item flex rules for one-dimensional layouts. Flexbox is the right pick when you're aligning a row or column of items: nav bars, button groups, card rows, or anything where one axis matters more than the other. (For two-axis layouts, use the CSS Grid generator instead.)
How to use the CSS Flexbox Generator
- 1
Configure the container
Six properties: flex-direction (row/column), flex-wrap, justify-content (main axis), align-items (cross axis), align-content (only when wrapping), and gap. Click each to see option chips.
- 2
Add or remove items
+ Add Item drops a colored block into the preview. Hover an item to expose the remove (×) icon.
- 3
Customize individual items
Click any item in the preview to select it. Adjust flex-grow (how much it expands), flex-shrink (how much it can shrink), flex-basis (starting size), order (sort position), align-self (override container's align-items).
- 4
Load a preset or copy the CSS
Six presets: Nav Bar, Card Grid, Center All, Sidebar, Holy Grail, Equal columns. Switch between Split View (container + selected item) and Full CSS in the output panel.
Frequently Asked Questions
What flexbox properties can I set?
Container: flex-direction, flex-wrap, justify-content, align-items, align-content (active only when wrap is on), gap. Item: flex-grow, flex-shrink, flex-basis, order, align-self. The output omits properties left at their default to keep the CSS minimal.
Can I customize individual items?
Yes. Click any block in the preview to select it; the Item panel appears with sliders for flex-grow, flex-shrink, and order, a text input for flex-basis (auto, 200px, 50% all work), and an option group for align-self. Click the same item again or hit Deselect to clear.
Are there preset layouts?
Six: Nav Bar (logo + links + actions, space-between), Card Grid (3-column with wrap), Center All (single item dead-center), Sidebar (250px fixed + flexible main), Holy Grail (full Flexbox version of the layout), Equal (4 equal-width columns). Each loads container settings plus the right item set.