CSSGen.app

Flexbox Generator

Visualize and build CSS Flexbox container alignments, directions, wraps, gaps, and item controls dynamically.

Flex Direction
Justify Content (Main Axis)
Align Items (Cross Axis)
Flex Wrap
Gap16px
Visual Items
3
Item 1
Item 2
Item 3
display: flex;
flex-direction: row;
justify-content: flex-start;
align-items: stretch;
flex-wrap: nowrap;
gap: 16px;

What is a Flexbox in CSS?

The Flexible Box Layout Module (Flexbox) is a one-dimensional layout model designed for distributing space along columns or rows.

Why Use a CSS Flexbox?

It simplifies alignment, centering, distribution, and responsiveness of UI elements (like navbars, card contents, and action groups) without floating boxes.

CSS Syntax & Controls

Setting display: flex on a parent container turns it into a flex container. You can then align its children (flex items) along the main axis and cross axis using justify-content and align-items.

display: flex; flex-direction: row; justify-content: space-between; align-items: center;

Best Practices

  • Use the gap property instead of margins to create space between items.
  • Align items with center to easily align icons and texts vertically.

Common Mistakes

  • Confusing main axis (justify-content) and cross axis (align-items) when flex-direction changes to column.

Step-by-Step Guide: How to Use this Generator

  1. Choose row or column direction.
  2. Select alignment rules for justifying and aligning items.
  3. Adjust gap slider to add margins, and see elements resize in real-time.

Browser Compatibility

ChromeSafariFirefoxEdge
Yes (Full)Yes (Full)Yes (Full)Yes (Full)

Frequently Asked Questions (FAQ)

How do I center a div inside a flexbox container?

Set display: flex, justify-content: center, and align-items: center on the parent element.