Free Flexy Boxes Alternative
Flexy Boxes is a long-standing CSS flexbox playground and code generator that supports all existing flexbox implementations, including legacy browser prefixes (-webkit-flex, -ms-flexbox). It was created in the early days of flexbox when vendor prefixes were essential for cross-browser compatibility. While the tool still works well, the generated CSS includes outdated prefixes that modern browsers no longer need, making the code unnecessarily verbose. Fixie's CSS Flexbox Playground focuses on current browser standards, generating clean, modern CSS without legacy prefixes while still providing the same interactive visual controls and instant feedback.
Try CSS Flexbox Playground Free →CSS Flexbox Playground vs Flexy Boxes
| Feature | Fixie CSS Flexbox Playground | Flexy Boxes |
|---|---|---|
| Price | Free forever | Free |
| Signup Required | No | No |
| Privacy / Data Handling | Client-side only | Client-side only |
| Browser Prefix Support | Modern browsers only (clean CSS) | Legacy prefixes included (-webkit, -ms) |
| Flexbox Properties Covered | All modern flexbox properties | All properties including legacy syntax |
| Live Visual Feedback | Yes — instant layout preview | Yes — real-time visual updates |
| CSS Code Export | Yes — clean, modern CSS | Yes — includes vendor prefixes |
| Ads | None | None |
Why Choose Fixie?
Flexy Boxes is a solid flexbox playground that's been around since the early days of CSS flexbox adoption. It provides interactive controls for all flexbox properties, real-time visual feedback, and generates CSS code you can copy and use in your projects. The tool was particularly valuable when flexbox required vendor prefixes like -webkit-flex and -ms-flexbox for cross-browser compatibility. If you need to support very old browsers (IE 10, Safari 6, Chrome 21), Flexy Boxes generates the prefixed CSS automatically.
However, modern browsers (Chrome 29+, Firefox 28+, Safari 9+, Edge all versions) have supported unprefixed flexbox syntax for years. Including legacy prefixes in your CSS adds unnecessary code weight and maintenance burden. Flexy Boxes generates CSS like display: -webkit-flex; display: -ms-flexbox; display: flex; when modern projects only need display: flex;. If you're building for current browsers (which represents 99%+ of web traffic in 2026), the prefixes are dead weight.
Fixie's CSS Flexbox Playground generates clean, modern CSS using only standard flexbox syntax. You get the same interactive controls, real-time visual feedback, and code export — but the output is concise and follows current best practices. Adjust flex-direction, justify-content, align-items, gap, and item-level properties, then copy production-ready CSS without legacy cruft. Both tools are free and work entirely client-side. Use Flexy Boxes if you're maintaining a project that needs IE 10 support. Use Fixie for modern development where clean, maintainable CSS matters.
How to Use CSS Flexbox Playground
Step 1: Visit the Flexbox Playground
Navigate to fixie.tools/flexbox — works in any modern browser, no installation needed.
Step 2: Configure the Flex Container
Use the property controls to adjust flex-direction, justify-content, align-items, flex-wrap, and gap. The layout preview updates instantly as you change properties.
Step 3: Modify Flex Items
Experiment with item-level properties like flex-grow, flex-shrink, flex-basis, and align-self to see how individual items behave within the flex container.
Step 4: Copy Modern CSS
Click the copy button to grab the generated CSS. The code uses only modern, standard flexbox syntax — no vendor prefixes, no legacy syntax, just clean CSS ready for production.