CSS Flexbox & Grid Visualizer

An interactive CSS layout playground for Flexbox and CSS Grid. Tweak container and item properties in real time, explore responsive layout presets, inspect computed dimensions, and export clean CSS or Tailwind CSS utility code.

How to Use the CSS Flexbox & Grid Visualizer

The CSS Flexbox & Grid Visualizer is an interactive playground for designing, tweaking, testing, and exporting CSS layouts.

1. Mode Switcher

  • CSS Flexbox: Test 1D layouts with container properties (flex-direction, flex-wrap, justify-content, align-items, gap) and child item overrides (flex-grow, flex-shrink, flex-basis, align-self).
  • CSS Grid: Test 2D layouts with grid templates (grid-template-columns, grid-template-rows, gap) and item placement (grid-column, grid-row).

2. Interactive Layout Stage

  • Adjust the Item Count slider (1-12 items).
  • Click on any item card in the live stage to inspect and customize its specific properties in the control panel.
  • Hover over items to observe real-time recalculations.

3. One-Click Layout Presets

  • Flexbox Presets: Navigation Header, Centered Hero Section, Equal Columns, Wrapped Tag Cloud.
  • Grid Presets: Auto-Fit Cards (repeat(auto-fit, minmax(160px, 1fr))), Bento Box Grid, Holy Grail Web Page Layout.

4. Live Code Exporter

  • CSS Rules: Export clean, standard CSS block declarations for .container and .item-* classes.
  • Tailwind CSS: Instant generator for utility classes (flex flex-row justify-between items-center gap-4 or grid grid-cols-3 gap-4).

Key Features

  • Interactive Dual Playground: Seamlessly switch between CSS Flexbox (1D) and CSS Grid (2D) layout visualizers.
  • One-Click Layout Presets: Instant starter presets for Navigation Bars, Hero Sections, Bento Box Grids, Tag Clouds, and Auto-Fit Cards.
  • Per-Item Styling Overrides: Select individual items to customize flex-grow, align-self, grid-column, or grid-row span.
  • Dual Exporter (CSS & Tailwind): Clean output generation for both raw W3C CSS rules and modern Tailwind CSS utility classes.

Common Use Cases

  • Responsive Dashboard & Card Grids: Prototyping auto-fitting card layouts (repeat(auto-fit, minmax(...))) for dashboards, portfolio galleries, and product grids.
  • Tailwind & Raw CSS Code Generation: Testing layout properties visually and instantly copying corresponding Tailwind CSS utility classes or raw CSS declarations.
  • Centering & Alignment Debugging: Rapidly experimenting with justify-content, align-items, and gap to solve tricky alignment and spacing problems.
  • Header & Navbar Prototyping: Building responsive space-between navigation bars, tag clouds, and hero section structures.

Frequently Asked Questions

When should I use Flexbox vs. CSS Grid?

  • Use Flexbox for 1D content-driven layouts (rows or columns) such as navigation bars, form field groups, badge arrays, or centered elements.
  • Use CSS Grid for 2D structural layouts requiring both rows and columns simultaneously, such as photo galleries, dashboard cards, or full-page master layouts.

Is the generated CSS production-ready?

Yes! The output follows modern W3C CSS specifications and standard Tailwind CSS v3/v4 utility classes.

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