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CSS Grid Generator

The ultimate visual CSS Grid architect. Design complex layouts, paint grid areas, manage track sizing, and generate production-ready code instantly.

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Total Usage 3 times
Category CSS Tools
1 Select Cells → 2 Name Area → 3 Generate
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About

CSS Grid Layout is the most powerful layout system available in CSS. It allows for two-dimensional layouts to be created on the web. However, the syntax, particularly for grid-template-areas and complex track sizing, can be error-prone and difficult to visualize mentally. A single typo in a grid area string can break the entire structure.

This tool transforms the abstract coding process into a visual drafting experience. It is designed for developers who need to prototype robust, responsive interfaces without wrestling with syntax errors. By strictly separating the visual design from the code generation, we ensure that the resulting CSS is valid, optimized, and ready for production environments. This is particularly critical for large-scale applications where layout stability is paramount.

The visual editor supports advanced features including named grid areas, explicit track sizing using pixels, percentages, or fraction units fr, and gap management. The logic handles the mathematical distribution of space, ensuring that minmax() functions and auto flows behave as expected across different viewports.

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Formulas

When using the fraction unit fr, the browser calculates the available space after subtracting fixed sizes and gaps. The formula for a single fr unit is:

1fr = Wcontainer − ∑Tracksfixed − ∑GapsTotalfr

If the grid content is smaller than the grid container, alignment properties determine the position. For minmax(min, max), the track will never be smaller than min and never larger than max. If max is smaller than min, then max is ignored and the track is sized as min.

Reference Data

PropertyValuesApplies ToDescription
displaygrid, inline-gridContainerDefines the element as a grid container and establishes a new grid formatting context.
grid-template-columns200px, 1fr, repeat()ContainerDefines the line names and track sizing functions of the grid columns.
grid-template-rowsauto, minmax()ContainerDefines the line names and track sizing functions of the grid rows.
grid-template-areas"header header"ContainerSpecifies named grid areas. Cells not covered by an area are denoted by a dot (.).
column-gap10px, 1emContainerSets the size of the gap (gutter) between columns.
row-gap10px, 1emContainerSets the size of the gap (gutter) between rows.
justify-itemsstart, end, center, stretchContainerAligns grid items along the inline (row) axis (default is stretch).
align-itemsstart, end, center, stretchContainerAligns grid items along the block (column) axis (default is stretch).
justify-contentspace-between, centerContainerAligns the grid as a whole within the container (inline axis).
align-contentspace-between, centerContainerAligns the grid as a whole within the container (block axis).
grid-column1 / 3, span 2ItemShorthand for grid-column-start and grid-column-end.
grid-row1 / 3, span 2ItemShorthand for grid-row-start and grid-row-end.
grid-areaheader, 1/1/2/2ItemAssigns an item to a named area or defines start/end lines for both axes.
justify-selfstart, end, center, stretchItemAligns a grid item inside a single cell along the inline axis.
align-selfstart, end, center, stretchItemAligns a grid item inside a single cell along the block axis.

Frequently Asked Questions

Both allow you to place as many columns as possible on a line. "auto-fill" preserves empty tracks if there is extra space, essentially filling the row with empty columns. "auto-fit" collapses empty tracks to zero size, causing the filled tracks to expand and take up the remaining space (often used for responsive card layouts).
CSS Grid items stretch to fill their grid area by default. If your header is in a grid cell that is as tall as the page content, "position: sticky" won't have room to scroll. You must ensure the grid row containing the header is sized "auto" or fixed, and the header itself is aligned to "start".
Yes. Unlike Flexbox, CSS Grid allows you to place multiple items in the same cell or area. You can control the stacking order using the "z-index" property. This is useful for overlaying text on images or creating complex artistic layouts.
The "fr" unit stands for "fraction". It represents a fraction of the free space in the grid container. It is not a fixed unit like pixels. 1fr is calculated only after all non-flexible items (px, %, auto) have been laid out.
CSS Grid is supported in all modern browsers (Chrome, Firefox, Safari, Edge). Internet Explorer 10 and 11 support an older, prefixed version (-ms-grid) with different syntax. For most projects today, the standard syntax is sufficient, as IE11 market share is negligible.