CSS Flexbox Generator — OneFreePlace

Container

Control the flex parent and see the result instantly.

DisplayParent behavior

DirectionMain axis

WrapLine behavior

Justify content · main axis

Align items · cross axis

Align content · multi-line only

Row gap

Column gap

Preview width

Preview height

Items

Select a child to tune its own flex rules.

Item 14 items

Label

flex-grow

flex-shrink

flex-basis

order

align-self

Auto marginsPowerful spacer

min-inline-size

max-inline-size

Real-world presets

Useful patterns, not decorative demos.

Live layout760 × 360 · row · nowrap

Drag items to reorder source orderClick an item to edit

What’s happening: Items flow left-to-right on one line. Extra main-axis space stays after the last item because justify-content is flex-start.

Production output

Clean output with only the declarations your current layout needs.

Smart checks

Context-aware warnings about rules that may be misleading or ineffective.

Why this generator is different

It teaches the layout algorithm while still producing copy-ready code.

Container + child rules together.
Most mistakes happen because Flexbox is split between parent rules and item rules. Here both are editable in the same workspace.

Source order stays visible.
Dragging changes the HTML order. Using CSS order triggers an accessibility warning because visual and reading order can diverge.

Flexbox layout is calculated by the browser itself, so the live preview uses the same CSS properties you will ship. Tailwind output uses arbitrary values when a numeric setting does not map cleanly to a default utility. Keyboard users can select items from the Items list; source-order drag-and-drop is optional.

Flexbox, without the guesswork.

Production output

Smart checks

Why this generator is different

Import existing Flexbox CSS