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CSS Grid & Flexbox Builder

Our CSS Grid & Flexbox builder helps you create modern layouts with Grid, Flexbox, display, visibility, columns, overflow, and box-resize properties. Generate, preview, and copy CSS layout code instantly for professional web design.

⚡ Generate CSS How it works

Layout Types: 7 Options
Mode: In-browser
Time: Instant
Price: Free

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Complete Layout Suite

Generate Grid, Flexbox, display, visibility, columns, overflow, and box-resize properties all in one comprehensive tool.

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Live Preview

See exactly how your layout appears with real-time preview as you adjust controls.

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100% Private

Everything runs locally in your browser. Your code never leaves your device.

CSS Grid & Flexbox Builder online

Select layout type and adjust properties to generate CSS code.

Grid Properties

Template Columns

Examples: repeat(3, 1fr), 200px 1fr, auto

Template Rows

Gap: 16px

Justify Items

Align Items

Justify Content

Align Content

Generated CSS

display: grid;
grid-template-columns: repeat(3, 1fr);
grid-template-rows: repeat(2, 1fr);
gap: 16px;
justify-items: stretch;
align-items: stretch;
justify-content: start;
align-content: start;

Live Preview

Item 1

Item 2

Item 3

Item 4

Item 5

Item 6

This preview shows how your grid layout appears in real-time.

What are CSS Grid & Flexbox?

CSS Grid and Flexbox are modern CSS layout systems that revolutionized web design by providing powerful, flexible ways to arrange elements on a page. CSS Grid is a two-dimensional layout system that allows you to create complex layouts with rows and columns simultaneously, perfect for overall page structures, card grids, and dashboard layouts. Flexbox is a one-dimensional layout system for arranging items in a single row or column, ideal for navigation bars, form controls, and component-level layouts. Together with additional layout properties like display, visibility, columns, overflow, and box-resize, these tools provide complete control over element positioning and layout behavior.

According to the W3C CSS Grid Layout Module Level 1, Grid was designed to solve complex two-dimensional layout problems that were previously difficult or impossible with older CSS methods. The CSS Flexible Box Layout Module (Flexbox) provides a more efficient way to lay out, align, and distribute space among items in a container. Both specifications are now mature, stable standards with excellent browser support. Grid excels at creating page layouts, while Flexbox is perfect for component internals and one-dimensional arrangements.

CSS Grid uses a grid-based layout system where you define rows and columns, then place items into specific grid areas. Properties like grid-template-columns and grid-template-rows define the structure, while gap controls spacing. Flexbox uses a flex container and flex items model, with properties like flex-direction, justify-content, and align-items controlling alignment and distribution. The display property determines the layout context (block, flex, grid, inline), visibility controls element visibility without affecting layout, columns creates multi-column text layouts, overflow handles content that exceeds container dimensions, and resize allows user-resizable elements.

✓Grid Layout Example

display: grid;
grid-template-columns: repeat(3, 1fr);

✓Flexbox Layout Example

display: flex;
justify-content: space-between;

Modern web development relies heavily on Grid and Flexbox for responsive, maintainable layouts. Grid syntax includes grid-template-columns: repeat(3, 1fr) for equal columns, gap: 16px for spacing, and alignment properties like justify-items and align-items. Flexbox syntax includes flex-direction: row or column, justify-content for main-axis alignment, and align-items for cross-axis alignment. The display property accepts values like block, inline, flex, grid, and none. Visibility can be visible, hidden, or collapse. Columns use column-count and column-gap. Overflow handles visible, hidden, scroll, or auto. Resize enables none, both, horizontal, or vertical resizing.

Learn more on MDN CSS Grid, MDN Flexbox and Google Web.dev Grid Guide.

CSS Grid & Flexbox Impact

Real advantages of using CSS Grid and Flexbox in modern web development

165K+

Monthly Searches

Grid & Flexbox queries

95%+

Browser Support

All modern browsers

2017

Grid Standard

W3C Recommendation

7 Tools

Complete Suite

All layout properties

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Industry Adoption

According to Google Web.dev, CSS Grid and Flexbox are used in virtually every modern website. These layout systems are essential for creating responsive, maintainable designs. Major frameworks like Bootstrap 5, Tailwind CSS, and Material-UI are built on Grid and Flexbox. The W3C CSS Grid Layout Module and Flexbox Module specifications ensure long-term compatibility and standardization. Companies like Google, Microsoft, and Apple use Grid and Flexbox extensively in their web properties.

Why Use CSS Grid & Flexbox?

CSS Grid and Flexbox are essential for creating modern, responsive, and maintainable web layouts. They provide powerful two-dimensional and one-dimensional layout capabilities that replace older, hacky CSS methods. Whether you need complex page layouts with Grid, component-level arrangements with Flexbox, or additional layout control with display, visibility, columns, overflow, and box-resize properties, these tools provide everything you need to achieve professional design goals efficiently.

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Two-Dimensional Layout Control

CSS Grid provides powerful two-dimensional layout capabilities, allowing you to control both rows and columns simultaneously. This enables complex layouts like dashboards, card grids, and page structures that were previously difficult or impossible with older CSS methods. Grid gives you precise control over item placement and alignment in both dimensions.

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One-Dimensional Flexibility

Flexbox excels at one-dimensional layouts, making it perfect for navigation bars, form controls, and component-level arrangements. With properties like flex-direction, justify-content, and align-items, you can create responsive, flexible layouts that adapt to content and screen size. Flexbox simplifies centering, spacing, and alignment tasks that were complex with older CSS.

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Responsive Design Made Easy

Grid and Flexbox make responsive design significantly easier. Grid's auto-fit and minmax functions create fluid layouts that adapt to any screen size. Flexbox's flex-wrap and gap properties enable flexible component layouts. Combined with media queries, these tools eliminate the need for complex float-based layouts and provide cleaner, more maintainable responsive code.

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Performance & Browser Optimization

Grid and Flexbox are hardware-accelerated and optimized by modern browsers for excellent performance. They eliminate the need for JavaScript-based layout solutions, reducing page load times and improving Core Web Vitals. Both layout systems are supported in 95%+ of browsers globally, making them safe for production use without polyfills.

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Complete Layout Control

Beyond Grid and Flexbox, additional layout properties provide comprehensive control. Display controls rendering context (block, flex, grid, inline). Visibility manages element visibility without affecting layout. Columns create multi-column text layouts. Overflow handles content overflow scenarios. Box-resize enables user-resizable elements. Together, these properties provide complete layout management.

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Industry Standard & Future-Proof

Grid and Flexbox are W3C standards with long-term browser support guarantees. Major frameworks like Bootstrap, Tailwind CSS, and Material-UI are built on these technologies. Learning Grid and Flexbox is essential for modern web development, and these skills will remain relevant for years to come. They're the foundation of contemporary CSS layout.

How it Works

This CSS Grid & Flexbox Builder processes your selections entirely in your browser. No data is sent to any server, ensuring complete privacy and instant results. All layout code is generated client-side using modern CSS Grid, Flexbox, and layout properties.

Select Layout Type

Choose between Grid, Flexbox, Display, Visibility, Columns, Overflow, or Box-resize using the tab selector. Grid and Flexbox are the primary layout systems.

Adjust Properties

Use dropdowns, sliders, and input fields to adjust layout properties. For Grid, set columns, rows, gap, and alignment. For Flexbox, set direction, wrap, and alignment. See changes in real-time preview.

Copy CSS

Copy the generated CSS layout code to your clipboard and paste it into your stylesheet. The code is production-ready and follows modern CSS best practices.

Best Practices

Following best practices ensures your CSS Grid and Flexbox implementations are effective, accessible, and maintainable. Here are essential guidelines for using modern CSS layout systems effectively:

✓ Use Grid for Page Layouts, Flexbox for Components

Use CSS Grid for overall page structure, complex two-dimensional layouts, and card grids. Use Flexbox for component-level layouts, navigation bars, and one-dimensional arrangements. Many modern layouts combine both: Grid for the container structure and Flexbox for component internals. This separation of concerns improves maintainability and makes code easier to understand.

✓ Leverage Grid's Auto-Fit and Minmax for Responsiveness

Use Grid's auto-fit and minmax() functions to create fluid, responsive layouts without media queries. For example, grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)) creates a responsive grid that adapts to container width. This reduces the need for breakpoint-specific code and creates more maintainable responsive designs.

✓ Use Gap Instead of Margins for Spacing

Both Grid and Flexbox support the gap property for spacing between items. Use gap instead of margins on grid/flex items for cleaner, more predictable spacing. Gap creates consistent spacing that doesn't collapse and is easier to maintain. This is especially important for responsive designs where spacing needs to adapt consistently.

✓ Prefer Semantic HTML with Layout CSS

Use semantic HTML elements (header, nav, main, section, article, footer) and apply Grid or Flexbox layouts via CSS. Avoid using layout properties to create semantic structure. This improves accessibility, SEO, and maintainability. Screen readers and search engines rely on semantic HTML, while CSS handles visual presentation.

✓ Test Layout Behavior Across Screen Sizes

Always test Grid and Flexbox layouts on multiple screen sizes and devices. Use browser DevTools to simulate different viewport sizes. Check that content remains readable and accessible at all breakpoints. Consider using min-height and max-width constraints to prevent layout issues. Test with real content, not just placeholder text, as content length affects layout behavior.

✓ Use Display and Visibility Appropriately

Use display: none when you want to completely remove an element from the layout flow. Use visibility: hidden when you want to hide content but preserve layout space. Use appropriate display values (block, flex, grid, inline) to establish the correct layout context. Understanding these differences prevents layout shifts and improves performance.

Frequently Asked Questions

How do I use the CSS Grid & Flexbox Builder?

Select a layout type (Grid, Flexbox, Display, Visibility, Columns, Overflow, or Box-resize) from the tabs, then adjust the visual controls. The preview updates in real-time, and you can copy the generated CSS code to use in your stylesheets. Grid and Flexbox are the primary layout systems, while other tabs provide additional layout control properties.

What is the difference between CSS Grid and Flexbox?

CSS Grid is a two-dimensional layout system that allows you to create complex layouts with rows and columns simultaneously. Flexbox is a one-dimensional layout system for arranging items in a single row or column. Use Grid for overall page layouts and complex two-dimensional designs. Use Flexbox for component-level layouts and one-dimensional arrangements.

When should I use CSS Grid vs Flexbox?

Use CSS Grid when you need to create two-dimensional layouts with both rows and columns, such as page layouts, card grids, or complex dashboard designs. Use Flexbox for one-dimensional layouts like navigation bars, form controls, or aligning items within a container. Many modern layouts combine both: Grid for the overall structure and Flexbox for component internals.

What are CSS Grid template columns and rows?

Grid-template-columns defines the number and size of columns in a grid. Grid-template-rows defines the number and size of rows. You can use values like "1fr" (fractional units), fixed sizes (px, em), "repeat()" function, or named grid lines. For example, "repeat(3, 1fr)" creates three equal columns, and "200px 1fr 200px" creates a three-column layout with fixed sidebars.

What is the CSS display property?

The display property determines how an element is rendered. Common values include block (takes full width, new line), inline (flows with text, no width/height), inline-block (flows but accepts dimensions), flex (flexbox container), grid (grid container), and none (hidden). Display is fundamental to CSS layout and affects how elements interact with each other.

How does CSS visibility differ from display: none?

Visibility: hidden hides an element but preserves its space in the layout (element is invisible but still takes up space). Display: none completely removes the element from the layout flow (no space reserved). Use visibility when you want to hide content but maintain layout structure. Use display: none when you want to completely remove an element from the document flow.

What is CSS columns and when should I use it?

CSS columns (multi-column layout) automatically divides content into multiple columns, similar to newspaper layouts. It's useful for text-heavy content like articles, blog posts, or documentation. The column-count property sets the number of columns, column-gap sets spacing, and column-rule adds dividers. This property creates responsive text layouts without JavaScript.

How do CSS overflow properties work?

Overflow controls how content that exceeds an element's dimensions is handled. Overflow-x and overflow-y can be set to visible (content overflows), hidden (content clipped), scroll (scrollbars always shown), or auto (scrollbars when needed). Overflow is essential for containing content within fixed dimensions and preventing layout breaks.

What is the CSS resize property?

The resize property allows users to resize an element by dragging its corner or edge. Values include none (no resizing), both (resize horizontally and vertically), horizontal (width only), and vertical (height only). Resize is commonly used for textareas and custom resizable panels. The element must have overflow set to something other than visible for resize to work.

Do CSS Grid and Flexbox work in all browsers?

Yes, CSS Grid and Flexbox have excellent support in all modern browsers. Flexbox has been supported since 2012-2013, and CSS Grid since 2017. Both work without vendor prefixes in current browsers. For older browser support, you may need fallbacks or progressive enhancement strategies. According to Can I Use, Grid and Flexbox have 95%+ global browser support.