CSS Flexbox Playground — free online
Getting boxes to line up the way you want with flexbox can feel like guessing. You change one setting, the layout jumps, and you go back and forth until something sticks. We added a free tool that lets you skip the guessing — CSS Flexbox Playground — right in your browser.
What it does
You click the flexbox properties and the boxes rearrange in front of you, in real time. Try different directions, spacing, and alignment until the layout looks right, then copy the container CSS. It's a quick way to actually learn how flex works and to grab the exact code you need.
Nothing leaves your device
Everything happens in your browser. There's no upload and nothing is saved on a server — you're just playing with a live preview on your own screen. Close the tab and it's gone.
How to use it
- Open CSS Flexbox Playground in your browser.
- Click the flexbox properties and watch the boxes rearrange until the layout looks the way you want.
- Copy the container CSS and paste it into your project.
It's free with no limit. There are more small tools on the Apps page.