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Generador de Flexbox CSS (Visual)

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Container Properties

flex-direction

justify-content

align-items

flex-wrap

align-content

Applies only when items wrap onto multiple lines.

Espaciado (px)

Items

Item count

Click an item in the preview to edit its properties.

PROD.

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Guía

Generador de Flexbox CSS (Visual)

Design Flexbox layouts visually and copy production-ready CSS. Tweak direction, alignment, wrapping, gap, and per-item overrides while a live preview updates instantly. No guessing, no Chrome DevTools round-trips — just pick the container behaviour you need, watch it render, and grab the generated rules.

Cómo Usar

Elige un flex-direction (row, row-reverse, column, column-reverse) to set the main axis.
Elegir justify-content y align-items for how children line up along each axis.
Turn on flex-wrap if items should break onto new lines — align-content will appear for multi-line control.
Configura el gap in pixels to space items apart without margins.
Change the item count to add or remove flex children (1–12).
Click any item in the live preview to open the per-item editor and tweak flex-grow, flex-shrink, flex-basis, align-self, o order.
Copy the generated CSS and drop it into your stylesheet.

Características

Live visual preview – See the flex container and items re-layout instantly as you change properties.
Full container controls – flex-direction, justify-content, align-items, flex-wrap, align-content, and gap.
Per-item overrides – Click an item to edit flex-grow, flex-shrink, flex-basis, align-self, and order without hunting through devtools.
Dynamic item count – Add or remove flex children between 1 and 12 to mirror your real UI.
Clean CSS output – Container and per-item selectors are generated as a tidy, copy-ready snippet.
Runs entirely in the browser – No upload, no network round-trip; your configuration never leaves the page.

 Preguntas frecuentes

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. Swapping flex-direction between row and column flips which property controls horizontal versus vertical alignment.
When does align-content actually apply?

align-content only has an effect when flex-wrap lets items break onto multiple lines. On a single-line flex container (flex-wrap: nowrap) the browser ignores align-content because there is just one line to align.
What do flex-grow, flex-shrink, and flex-basis control?

flex-basis is the item's starting size along the main axis. flex-grow distributes remaining free space proportionally to items that have grow greater than 0. flex-shrink allows items to shrink below their basis when space runs out; 0 means the item keeps its basis size.
Can order replace changing HTML markup?

The order property changes visual position only — the source order in the DOM stays the same. That keeps flexibility for layout but can hurt screen-reader users if the visual and logical reading order drift too far apart, so use it sparingly for accessibility-sensitive content.
Should I still use Flexbox when CSS Grid exists?

Flexbox is tuned for one-dimensional layouts — a row or a column where items size themselves based on their content and available space. Grid excels at two-dimensional layouts with explicit tracks. Most real interfaces use both: Grid for the page skeleton, Flexbox for components inside each cell.