What is the CSS Flexbox Playground?

It is a free online tool for visually checking the effects of each Flexbox property in real time, with CSS code output support.

Is it free? Is my data safe?

Completely free. Everything runs in your browser, and no data is sent externally.

Can I use it to learn Flexbox?

Yes. Changes to each property are instantly reflected in the preview, making it easy to visually understand how Flexbox works while learning.

CSS Flexbox Playground

A learning and development tool for visually understanding CSS Flexbox layout behavior by changing properties and seeing results update instantly. It lets you configure both container and individual item properties, with generated CSS code ready to copy. Perfect for developers learning Flexbox for the first time, front-end engineers prototyping layouts quickly, and CSS instructors demonstrating layout concepts in real time.

Color Picker

HEX

RGB

rgb(99, 102, 241)

HSL

S (%)

L (%)

hsl(239, 84%, 67%)

Practical Guide

Design helpers for colors, fonts, CSS, aspect ratios, mockups, and visual materials. Useful when testing UI ideas, preparing assets, or checking layout details.

When this tool is useful

CSS Flexbox Playground helps with common Design Tools tasks that require quick checking, conversion, or creation. It supports workflows such as Real-time visualization of Flexbox property effects, Set container and item properties individually without forcing users to switch pages or apps.

Processing and privacy

Your input is processed in the browser and is not designed to be sent to a server just to use the tool. This makes it suitable for temporary checks, draft work, and pre-publication cleanup.

Workflow tip

After checking the result, use the related tools and same-category links near the bottom of the page to continue the surrounding task. Frequently used tools also appear in the Recently Used section.