CSS Flexbox Generator

Build a Flexbox example

1. Choose the sample size, writing direction, wrapping and alignment.
2. Select each item to edit its text, flexible sizing, minimum behavior and visual order.
3. Inspect the axes and preview, then copy the current CSS and HTML fragment or download the complete example.

Understand the example

The main axis follows row or column in the selected writing mode. Reverse settings change its start and end; RTL is not simply a universal horizontal flip.

Flex basis is a starting main size, not a guaranteed final width. Growth, weighted shrinking, wrapping and automatic minimum sizes all influence the browser's result.

Source-order controls change the HTML. CSS order and reverse settings change visual arrangement without changing logical reading or keyboard order.

The sample has explicit border-box dimensions, padding, borders and scrolling. Its inner available space is smaller, and system fonts or scrollbars can change layout.

Useful experiments

Give three items positive grow values and compare how extra space is shared. Change their text and automatic minima rather than assuming every flex item becomes equal.

Enable wrapping, narrow the sample and change align content. A nowrap container ignores align content; a wrapping container can use it even when only one actual line is present.

Compare LTR and RTL, then try vertical writing. Read the physical start and end labels instead of assuming row always means left to right.

Know what is generated

This is a bounded fixed-size component example, not a page builder or a responsive design guarantee. Your real content and surrounding styles require their own review.

Automatic minima can prevent the shrink result you expected. Allow below content explicitly changes both minimum dimensions; the tool does not apply that change invisibly.

Fit changes only the viewing scale. Use 100% and the contained scroll areas to inspect details; parsing support or a loaded preview does not certify every browser's rendering.

Copy HTML provides a fragment that also needs the CSS. The complete HTML download contains the same document used for preview, including its small document reset and restrictive resource policy.

Local authoring

The tool does not upload or save your sample text or generated code. Clipboard and complete-example download are explicit actions; ordinary site services retain their own privacy behavior.