CSS Layout Generator
Visually build Flexbox and CSS Grid layouts with a live preview, then copy the generated CSS.
About This Tool
The CSS Layout Generator is a free, browser-based tool that lets you visually design Flexbox and CSS Grid layouts without writing a single line of code by hand. Instead of trial-and-error in your editor, you adjust properties through intuitive controls and instantly see the result in a live preview pane. Once you are satisfied with the layout, copy the generated CSS and paste it straight into your project.
Flexbox is ideal for one-dimensional layouts — arranging items in a
single row or column. You can control the direction, alignment,
spacing, and wrapping of child elements. This makes it perfect for
navigation bars, card rows, form controls, and centering content
both horizontally and vertically. The generator exposes every key
Flexbox property: flex-direction,
justify-content, align-items,
flex-wrap, and gap.
CSS Grid is designed for two-dimensional layouts where you need
control over both rows and columns simultaneously. It excels at
full-page layouts, dashboards, image galleries, and any design that
requires items to snap to a structured grid. The generator lets you
set the number of columns and rows (rendered as
repeat(N, 1fr)), gap spacing, and alignment
properties like justify-items and
align-items.
All processing happens entirely in your browser. No data is sent to any server, so you can use this tool on any network without privacy concerns. The generated CSS is clean, standards-compliant, and ready for production use in any modern browser that supports Flexbox and Grid — which includes all major browsers released after 2018.
How to Use
- Choose between Flexbox and Grid mode using the tabs at the top.
- Adjust the layout properties using the controls in the left panel. For Flexbox, set direction, justification, alignment, wrap, and gap. For Grid, set column and row counts, gap, item count, and alignment.
- Watch the Live Preview update in real time as you change settings. Colored numbered boxes represent child elements.
- Review the Generated CSS code below the preview. It includes a
.containerclass for the parent and an.itemclass for children. - Click the Copy button (or press Ctrl+Shift+C) to copy the CSS to your clipboard.
- Paste the CSS into your stylesheet, apply the classes, and adjust colors or sizing to match your design.
FAQ
When should I use Flexbox vs CSS Grid?
Use Flexbox when your layout flows in one direction — a row of buttons, a vertical stack of cards, or centering a single element. Use CSS Grid when you need to control both rows and columns at the same time, such as a dashboard layout, a photo gallery, or a full-page structure with header, sidebar, and content areas. You can also combine them: Grid for the overall page structure and Flexbox for components inside each grid cell.
Can I create responsive layouts with this tool?
The generated CSS uses fr units and flex-wrap, which are inherently flexible. For breakpoint-specific changes, wrap the generated properties in media queries in your stylesheet. For example, you could generate a 3-column Grid layout for desktop and override it to 1 column inside a @media (max-width: 768px) block.
What browsers support Flexbox and Grid?
Flexbox has full support in all modern browsers including Chrome, Firefox, Safari, and Edge. CSS Grid is supported in Chrome 57+, Firefox 52+, Safari 10.1+, and Edge 16+. According to Can I Use, both features have over 97% global browser support, making them safe for production use without vendor prefixes.
What does the gap property do?
The gap property sets the spacing between child elements without adding margin to the outer edges. It works in both Flexbox and Grid layouts. Unlike margin-based spacing, gap only applies between items, so you never end up with unwanted space on the container edges. You can set it in pixels, rems, or any other CSS unit.
Is my data sent to a server?
No. The CSS Layout Generator runs entirely in your browser. There are no server requests, no data collection, and no third-party scripts involved. The CSS is generated locally using JavaScript and never leaves your machine.
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