What's the difference between justify-content and align-items?

Justify-content aligns items along the main axis (horizontal in a row, vertical in a column). Align-items aligns items along the cross axis (vertical in a row, horizontal in a column). Together they control both dimensions of your layout.

When should I use flexbox instead of CSS grid?

Use flexbox for one-dimensional layouts — a single row or column of items. Use CSS grid for two-dimensional layouts with both rows and columns. Flexbox excels at navigation bars, card rows, and centering. Grid is better for dashboard layouts and page-level structures.

What does flex-grow do?

Flex-grow determines how much a flex item should grow relative to other items when there's extra space. A flex-grow of 1 means the item takes equal share of available space. A flex-grow of 2 means it takes twice as much as items with flex-grow: 1. The default is 0 (no growth).

How do I center content with flexbox?

Set justify-content: center and align-items: center on the flex container. This centers items both horizontally and vertically. The container needs a defined height for vertical centering to work.

What is the gap property in flexbox?

The gap property sets the spacing between flex items without using margins. It's cleaner than margin-based spacing because it doesn't add extra space at the edges of the container. Gap works in all modern browsers.

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CSS Flexbox Generator

A CSS flexbox generator creates flex layouts visually by adjusting container properties like justify-content, align-items, flex-direction, and flex-wrap. It supports per-item flex-grow, flex-shrink, and flex-basis controls. The preview updates in real time and CSS code copies with one click.

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What is CSS Flexbox Generator?

A CSS flexbox generator is a visual tool that lets you build flex layouts by interactively adjusting container and item properties, previewing the layout in real time, and copying the generated CSS code directly into your project.

Complementary Tools

These tools work great alongside CSS Flexbox Generator:

CSS Minifier CSS Gradient Generator

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Flexbox is the workhorse of modern CSS layout, but getting the right combination of properties can involve a lot of trial and error. This generator gives you a visual canvas where you can see every property change in real time — from alignment to wrapping to individual item sizing. Build the layout you need, copy the CSS, and move on to building features instead of debugging alignment.

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