When should I use Flexbox vs Grid?

Use Flexbox for one-dimensional layouts (a row or a column). Use CSS Grid for two-dimensional layouts (rows and columns simultaneously). Flexbox is ideal for nav bars, button groups, and card rows.

What does align-content do?

align-content controls how multiple rows/columns are distributed when there is extra space on the cross axis. It only applies when flex-wrap is set to wrap or wrap-reverse.

What is the difference between justify-content and align-items?

justify-content distributes space along the main axis (horizontal for row, vertical for column). align-items aligns items on the cross axis (the opposite direction).

CSS Flexbox Generator

Runs in browser

Visual CSS Flexbox builder with live preview, CSS and Tailwind output.

Visually build CSS Flexbox layouts. Choose flex-direction, flex-wrap, justify-content, align-items, and gap values with a live preview. Get instant CSS and Tailwind class output.

flex-direction

flex-wrap

justify-content

align-items

align-content

gap: 8px

Items

CSS

display: flex;
flex-wrap: wrap;
align-items: center;
gap: 8px;

Tailwind classes

flex flex-wrap justify-start items-center gap-[8px]

🔒 Runs in your browser · No uploads · Your data never leaves your device

How to use

Choose flex properties
Click pills to set flex-direction, flex-wrap, justify-content, and align-items. The live preview updates instantly.
Adjust gap and item count
Drag the gap slider to set spacing between items. Change the item count to test different layouts.
Copy the output
Click 'Copy CSS' to copy the CSS rule, or use the Tailwind classes line for Tailwind projects.

Common use cases

Learning Flexbox layout properties — Experiment with justify-content and align-items interactively to understand how flex containers distribute space.
Generating Tailwind flex classes — Pick layout properties visually and get the equivalent Tailwind utility classes for your JSX.

Examples

Centered content
Set justify-content: center and align-items: center to center items both axes.
Output
```
display: flex;
justify-content: center;
align-items: center;
```

Frequently asked questions

When should I use Flexbox vs Grid?: Use Flexbox for one-dimensional layouts (a row or a column). Use CSS Grid for two-dimensional layouts (rows and columns simultaneously). Flexbox is ideal for nav bars, button groups, and card rows.
What does align-content do?: align-content controls how multiple rows/columns are distributed when there is extra space on the cross axis. It only applies when flex-wrap is set to wrap or wrap-reverse.
What is the difference between justify-content and align-items?: justify-content distributes space along the main axis (horizontal for row, vertical for column). align-items aligns items on the cross axis (the opposite direction).

Key concepts

Main axis: The primary direction of a flex container — horizontal for row (default) or vertical for column.
justify-content: The CSS property that distributes flex items along the main axis — center, space-between, space-around, etc.

You might find these useful too.

More css tools

CSS to Tailwind Converter
Convert CSS to Tailwind utility classes instantly. Figma Inspect supported.
Open