What is CSS Flexbox?
CSS Flexbox (Flexible Box Layout) is a one-dimensional layout model for distributing space and aligning items in a row or column. The flex container is defined with display: flex, and its direct children become flex items. Key container properties: flex-direction (row or column), flex-wrap (single vs. multi-line), justify-content (main-axis alignment), align-items (cross-axis alignment per line), and align-content (cross-axis alignment of multiple lines). Key item properties: flex-grow (how much an item grows), flex-shrink (how much it shrinks), flex-basis (initial size), and align-self (overrides the container's align-items for a specific item). Flexbox is ideal for navigation bars, card rows, centered layouts, and any one-dimensional arrangement.
How to Use the CSS Flexbox Generator
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Adjust the container properties (flex-direction, flex-wrap, justify-content, align-items, align-content, gap) using the dropdowns and input.
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Click any item in the preview to select it (turns orange).
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Set the selected item's flex-grow, flex-shrink, flex-basis, and align-self in the item panel.
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Click '+ Add Item' to add more items; click 'Remove' to delete the selected item.
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Switch between CSS and HTML tabs to see the generated code, then click Copy.
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Click Reset All to start over with the default 3-item layout.