What is the CSS Grid Generator?
The CSS Grid Generator is a visual layout builder for creating CSS Grid templates without writing code from scratch. It is built for front-end developers, designers, and anyone who needs a quick grid structure for a webpage, dashboard, or application layout. Common use cases include prototyping page layouts, building card grids for product listings, and creating admin panel dashboards with sidebar and content areas.
How to Use
- Set the number of columns and rows using the + and − buttons. Each track can use a different unit (fr, px, %, auto, or minmax).
- Adjust column gap and row gap to control spacing between cells.
- Optionally change justify-items and align-items to control how content is positioned inside each cell.
- Watch the live preview update in real time on the right.
- Click Copy CSS or Copy HTML to grab the generated code and paste it into your project.
How It Works
The tool constructs a valid grid-template-columns and grid-template-rows declaration based on your track definitions. Each track is converted to its CSS value — for example, a track with value "1" and unit "fr" becomes 1fr, while "auto" produces the literal keyword. The gap property is generated as a shorthand when both column and row gaps match, or as the two-value syntax (row-gap column-gap) when they differ. Alignment properties are only included when they differ from the default stretch value, keeping your output clean.
The live preview applies the same CSS values to a real DOM grid so you see exactly what the generated code produces. Cell count is always columns × rows, and the HTML output matches.
Examples
3-column equal layout: Set 3 columns to 1fr each with a 16px gap. This is the default starting point and works well for card grids, blog post listings, and feature sections.
Sidebar + content: Create 2 columns — the first at 250px and the second at 1fr. This gives you a fixed-width sidebar with a fluid content area. Common for admin dashboards and documentation sites.
Responsive minmax grid: Use minmax(200px, 1fr) on 3 columns. Each column will be at least 200px wide but grow to fill the container. Combine this with auto-fit in your final code for a fully responsive card grid.
Tips
- Use fr units for fluid, proportional layouts that adapt to screen size.
- Mix px and fr to create fixed sidebars with flexible content areas.
- Keep gaps consistent — matching column and row gaps produce a cleaner shorthand in the generated CSS.
- The generated code is a starting point. For production, consider adding
auto-fitorauto-fillwithrepeat()for responsive behavior.
Frequently Asked Questions
What is the difference between fr and px units in CSS Grid?
The fr unit represents a fraction of the available space in the grid container. For example, 1fr 2fr gives the second column twice the space of the first. Pixel (px) values are fixed — they don't change with the container size. Use fr for fluid layouts and px when you need exact control.
How many columns and rows can I add?
This tool supports up to 12 columns and 12 rows, which covers virtually all real-world layout needs. Most production layouts use between 2 and 6 columns.
Can I use minmax() values?
Yes. Select 'minmax' as the unit type and enter a value like '200px, 1fr' to create responsive tracks that have a minimum size but grow to fill space.
Does this tool generate responsive CSS?
The generated CSS is a single grid declaration. For responsive layouts, wrap the output in media queries or combine with auto-fit/auto-fill and minmax. The tool gives you the core grid structure to build on.
Privacy and methodology
This tool runs entirely in your browser. No data is sent to any server. The grid CSS is generated client-side by concatenating your track definitions and gap values into valid CSS property declarations. The live preview renders the same values using inline styles on a real grid container.