Simon Willison’s Weblog

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24th May 2025

Tool Interactive CSS Flexbox Playground — Experiment with CSS Flexbox properties in real-time using this interactive playground. Adjust container properties like flex-direction, justify-content, and align-items while watching the layout change instantly, then select individual items to customize their flex-grow, flex-shrink, flex-basis, and alignment settings. The dynamically generated CSS code output shows the exact syntax needed to recreate your layout, making it an effective learning tool for mastering flexbox concepts.

This is a beat by Simon Willison, posted on 24th May 2025.

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