Flexbox has a handful of properties that interact in ways that aren't always intuitive from reading documentation alone — this tool lets you adjust each one visually and see the layout respond immediately with sample boxes.
Change direction, justify-content, align-items, and gap using simple dropdowns and watch three sample items rearrange live in the preview, then copy the exact CSS once the layout looks right.
This is useful for quickly prototyping a flex layout before writing it into your actual project, or as a learning aid for understanding how each flexbox property affects item positioning.
Because everything runs locally in your browser, results appear instantly and nothing you type or upload is ever sent to a server.
Bookmark this page if you expect to use this tool regularly — it loads fast and behaves the same way every time, with no account needed.
This kind of task shows up constantly in everyday writing, coding, design, and admin work, which is exactly why a dedicated, focused tool saves so much back-and-forth.
A tool that does one job well, without a cluttered interface or unrelated features competing for attention, tends to be faster to use than a heavier all-in-one app.
If you find yourself needing this conversion or calculation often, keeping this page open in a tab is usually faster than digging through a bigger software suite's menus.
Because there's no sign-up or installation step, you can jump straight from search result to working tool in a couple of seconds.
Frequently asked questions
What's the difference between justify-content and align-items?
justify-content controls alignment along the main axis (the flex-direction), while align-items controls alignment along the cross axis (perpendicular to it).
Does this cover flex-wrap too?
This version focuses on the core alignment properties; flex-wrap and more advanced flex-grow/shrink behavior would need to be added manually to the generated CSS.