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Flexbox Playground

Interactive CSS flexbox layout visualizer

gap8px
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CSS Output
display: flex;
flex-direction: row;
justify-content: flex-start;
align-items: stretch;
flex-wrap: nowrap;
gap: 8px;

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About This Calculator

CSS Flexbox is a one-dimensional layout model that distributes space among items in a container and aligns them along a main axis and cross axis. This interactive playground lets you experiment with Flexbox container properties visually: flex-direction, justify-content, align-items, align-content, and flex-wrap. As you toggle properties, the layout updates in real time and the generated CSS code is available to copy. Flexbox is the go-to solution for navigation bars, centering content, equal-height columns, dynamic spacing, and responsive component layouts. Understanding Flexbox is fundamental for every front-end developer.

How to Use

  1. 1
    Set container properties
    Choose flex-direction, justify-content, align-items, and other container settings.
  2. 2
    View the layout
    See how flex items respond to different container property combinations in real time.
  3. 3
    Copy the CSS
    Copy the generated Flexbox CSS code for use in your project.

Frequently Asked Questions

Q. How do I center an element vertically and horizontally with Flexbox?
Set the parent container to display: flex; justify-content: center; align-items: center. The child element will be perfectly centered both vertically and horizontally. This is the most common and reliable centering technique in CSS.
Q. What is the difference between flex-grow and flex-basis?
flex-basis sets the initial size of a flex item before extra space is distributed (similar to width). flex-grow determines how much of the remaining space the item should absorb relative to other items. flex-basis: 200px with flex-grow: 1 means the item starts at 200px and expands to fill available space.
Q. When should I use flex-wrap?
Use flex-wrap: wrap when you want items to flow to the next line instead of shrinking to fit a single row. This is essential for responsive card grids and tag lists that should stack on smaller screens rather than overflow.

Disclaimer: Results are for informational purposes only and do not constitute professional advice. Always consult qualified professionals for important decisions.

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