BYTETOOLS

CSS Flexbox Generator

Build flexbox layouts visually with controls for direction, justify-content, align-items, wrap and gap. Live preview of the boxes and copy-ready CSS.

1
2
3
4

Flex container settings

12
4

CSS

.container {
  display: flex;
  flex-direction: row;
  justify-content: flex-start;
  align-items: stretch;
  flex-wrap: wrap;
  gap: 12px;
}

What is the CSS Flexbox Generator?

The CSS Flexbox Generator turns the flexbox properties everyone forgets into a visual playground. Set flex-direction, justify-content, align-items, flex-wrap and gap, choose how many boxes to preview, and watch the layout rearrange in real time so you can see exactly what each property does.

  • Controls for direction, justify, align, wrap and gap
  • Live preview with an adjustable number of boxes
  • Clean, copy-ready flex container CSS
  • Great for learning flexbox visually
  • All modern flexbox values supported
  • Fully client-side, private and free

How to use the CSS Flexbox Generator

  1. 1

    Choose a flex-direction: row, row-reverse, column or column-reverse.

  2. 2

    Set justify-content and align-items to position the items on both axes.

  3. 3

    Toggle flex-wrap and drag the gap slider, then change the box count to preview.

  4. 4

    Copy the generated flex container CSS and paste it into your project.

About the CSS Flexbox Generator

The CSS Flexbox Generator turns the flexbox properties everyone forgets into a visual playground. Set flex-direction, justify-content, align-items, flex-wrap and gap, choose how many boxes to preview, and watch the layout rearrange in real time so you can see exactly what each property does.

It is perfect for learning flexbox by experimentation and for grabbing production-ready CSS fast. Every change updates a clean container rule you can copy straight into your stylesheet, with no guessing about property names or valid values.

Everything runs 100% locally in your browser — no uploads, no sign-up, and it keeps working offline once the page has loaded.

Frequently asked questions

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

justify-content positions items along the main axis (the direction set by flex-direction), while align-items positions them along the cross axis. In a row layout, justify-content moves items left/right and align-items moves them up/down.

How does flex-direction change the axes?

flex-direction sets which way the main axis runs. With row the main axis is horizontal, so justify-content controls horizontal spacing; with column the main axis is vertical, so justify-content now controls vertical spacing and align-items controls horizontal.

When should I use flex-wrap?

Set flex-wrap to wrap when items should flow onto multiple lines instead of shrinking to fit one line. It is essential for responsive card grids and tag lists that need to reflow on narrow screens.

Does the gap property work in flexbox?

Yes. The gap property is supported in flexbox in all modern browsers and is the cleanest way to space items evenly without margins. This tool outputs gap in pixels so spacing stays consistent.

Is flexbox better than CSS grid?

They solve different problems. Flexbox is ideal for one-dimensional layouts (a row or a column), while grid excels at two-dimensional layouts with both rows and columns. Many layouts use both together.

Related tools