Flexbox Generator
Visual CSS flexbox playground with live preview
Container Properties
Click an item to select it
Generated CSS
Frequently Asked Questions
What is CSS Flexbox? +
CSS Flexbox (Flexible Box Layout) is a one-dimensional layout model that lets you distribute space among items in a container and align them efficiently, even when their sizes are unknown or dynamic.
What is the difference between justify-content and align-items? +
justify-content controls alignment along the main axis (horizontal by default), while align-items controls alignment along the cross axis (vertical by default). When flex-direction is column, these axes swap.
What does flex-wrap do? +
flex-wrap controls whether flex items are forced onto a single line or can wrap onto multiple lines. By default, items try to fit on one line. Setting flex-wrap to 'wrap' allows items to flow onto new lines when they run out of space.
How do flex-grow, flex-shrink, and flex-basis work? +
flex-grow defines how much an item should grow relative to siblings when extra space is available. flex-shrink defines how much it should shrink when space is tight. flex-basis sets the initial size of the item before growing or shrinking.
Is this Flexbox Generator free to use? +
Yes, this tool is 100% free with no sign-up required. All processing happens in your browser — nothing is sent to a server. You can copy the generated CSS and use it in any project.