# CSS Flexbox Generator

> Experiment with flex direction, alignment and wrapping, then copy the CSS.

To build a flexbox layout, choose a direction and alignment and the preview updates instantly. The key idea is that justify-content works along the main axis and align-items across it — so changing direction to column swaps which property controls horizontal position.

**URL:** https://convertto.tech/t/flexbox-generator
**Category:** CSS Generators (https://convertto.tech/c/css-generators)
**Privacy:** Runs entirely in the browser; no upload
**Cost:** Free, no sign-up
**Last updated:** 2026-08-01

## Key facts

- **Privacy:** Runs entirely in your browser — nothing is uploaded
- **Cost:** Free, unlimited, no sign-up

## How to use

1. Choose the direction.
2. Choose the wrap.
3. Choose the justify content (main axis).
4. Choose the align items (cross axis).
5. Set the gap.
6. Set the preview items.
7. The result appears immediately — copy or download it.

## FAQ

### Why does justify-content suddenly move things vertically?

It always works along the main axis, and flex-direction decides which axis that is. With direction: column the main axis is vertical, so justify-content controls vertical spacing and align-items controls horizontal.

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