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Flexbox Playground

Build a basic flex container declaration without a drag-and-drop layout builder or arbitrary CSS execution.

  • Direction/justify/align
  • Gap + wrap
  • Plain CSS output
Online tool

Try the tool

Add your data, choose the settings, and get the result.

Input

Result

display: flex;
flex-direction: row;
justify-content: space-between;
align-items: center;
gap: 16px;
flex-wrap: wrap;
  • The tool emits a container declaration, not a full layout editor.

Your data stays here

Text and selected files are processed in the current browser and are not sent to a server to produce the result.

Reviewed: 2026-07-17
01

How to use it

  1. 1

    Choose flex-direction.

  2. 2

    Tune justify-content, align-items, gap, and wrap.

  3. 3

    Copy the CSS declaration block.

02

What the tool can do

  • Core flex-direction values.
  • Core justify-content and align-items values.
  • Bounded gap and flex-wrap toggle.
03

Common use cases

  • Basic setup for a toolbar, card row, or navigation group.
  • Comparing alignment values before implementation.
  • Capturing a container declaration for UI kit documentation.
04

How it works inside

The output is limited to container-level declarations.

Gap is limited to 0–64 px for compact, predictable CSS.

05

Questions and answers

Why no flex-basis?

Flex-basis belongs to child item rules, while this tool generates container CSS only.

Does this replace a layout builder?

No. This is a bounded generator for quick CSS output, not a visual layout editor.