📐 CSS Subgrid Generator

What Can the CSS Subgrid Generator Do?

The CSS Subgrid Generator is a free online tool for visually configuring CSS Grid sub-grid layouts. Supports column/row subgrid toggles, track definitions, gap control, with live preview and CSS/HTML code generation. Perfect for frontend developers implementing nested grid alignment.

Core Features

• Visual Config: Drag to adjust columns, gaps, track definitions
• Subgrid Toggles: Independent column/row subgrid control
• Live Preview: Parent (blue) and child (green) grids clearly distinguished
• Code Generation: One-click CSS and HTML output
• 4 Presets: Cards, Form, Dashboard, Navigation layouts

Use Cases

Card List Alignment

When card internal elements (title, description, button) need cross-card alignment, subgrid lets all cards share the same track height.

Form Layout

Form labels and inputs need precise alignment. Subgrid lets nested form groups inherit parent grid column definitions.

Dashboard

Dashboard nested panels need to align to the same grid system. Subgrid ensures all panel internals align with the overall layout.

Background

CSS Subgrid is a core feature of CSS Grid Level 2, implemented in all major browsers in 2023. It solves the core pain point of Grid nesting: child grids can't align with parent tracks. Traditional workarounds required manual calculations or fixed sizes. Subgrid inherits parent definitions directly, resulting in cleaner code and easier maintenance. Key syntax: grid-template-columns: subgrid and grid-template-rows: subgrid.