Bootstrap Grid Generator
Build Bootstrap 5 grid layouts visually and export HTML markup
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About Bootstrap Grid Generator
Design Responsive Layouts Visually with the Bootstrap Grid Generator
Bootstrap's 12-column grid system is the backbone of countless websites. It provides a flexible, responsive framework for arranging content across screen sizes. But configuring rows, columns, offsets, and breakpoint-specific widths by hand can be fiddly, especially when you need different layouts at different screen sizes. The Bootstrap Grid Generator lets you design your grid visually, see it respond to different viewport widths in real time, and export the HTML markup when you're satisfied.
How Bootstrap's Grid System Works
At its core, Bootstrap uses a container, row, and column hierarchy. The container centers and constrains the content. Rows are horizontal groups of columns. Columns are defined using classes like col-md-6, which means the column occupies 6 out of 12 units at the medium breakpoint and above. By combining different column widths across breakpoints (col-sm, col-md, col-lg, col-xl, col-xxl), you create layouts that adapt gracefully from mobile phones to widescreen monitors.
The system supports offsets (pushing columns to the right), ordering (rearranging visual order without changing HTML order), nesting (grids within grids), and gutters (spacing between columns). Configuring all of these through class names alone requires a solid mental model of the grid, and the more complex the layout, the easier it is to make mistakes.
What the Bootstrap Grid Generator Does
The tool presents a visual canvas where you can add rows and columns by clicking. Drag column edges to resize them, and the tool snaps to Bootstrap's 12-column increments. For each column, you can set the width at every breakpoint, add offsets, and configure ordering. A responsive preview lets you see how the layout looks at each Bootstrap breakpoint, from extra-small mobile screens to extra-large desktops.
When your layout looks right at every size, the tool generates the complete HTML structure with all the correct Bootstrap grid classes. You get properly nested containers, rows, and columns with responsive class names that follow Bootstrap's conventions. Copy the markup, paste it into your project, and the layout is ready to use.
Complex Layouts Made Simple
Consider a common layout: a full-width hero on mobile that becomes a two-column layout on tablets and a three-column layout on desktops, with the sidebar switching from below the content on mobile to the left side on desktop. Building this requires classes like col-12, col-md-8, col-lg-9 for the main content and col-12, col-md-4, col-lg-3 with order classes for the sidebar. The generator lets you configure each breakpoint visually, so you can see the layout shift as you adjust, catching issues before they reach production.
Bootstrap 5 Compatibility
The generator produces markup compatible with Bootstrap 5, the latest major version. It uses the updated class naming conventions, including the xxl breakpoint, the gap utilities for gutter control, and the flex-based column system. If your project still uses Bootstrap 4, the core grid classes are largely the same, but you should verify the output against your version's documentation.
Saving Time on Prototypes and Production
Whether you're building a quick prototype to validate a layout idea or configuring the production grid for a client project, the Bootstrap Grid Generator saves significant time. Prototyping is faster because you're working visually instead of mentally computing column widths. Production work is more accurate because you can verify responsive behavior at every breakpoint before writing a line of CSS.
For Teams and Solo Developers Alike
Teams benefit from the generator as a communication tool. A designer can configure a layout and share the generated HTML with developers, eliminating ambiguity about column widths and breakpoint behavior. Solo developers benefit from the speed and accuracy it brings to an otherwise tedious task. The tool runs entirely in your browser, requires no account, and produces clean, standards-compliant markup every time.