CSS Flexbox Generator

Visually configure and test CSS Flexbox layouts with instant real-time live preview and clean CSS export.

CSS Flexbox Visual Playground & Generator

Test flexbox properties interactively and generate clean CSS and Tailwind CSS classes.

flex-direction

justify-content (Main Axis)

align-items (Cross Axis)

gap: 16px

Flex Items (4)

Generated CSS

.container {
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

Mastering Modern CSS Flexbox Layouts

CSS Flexible Box Layout (Flexbox) provides a powerful, predictable way to distribute space and align content inside a container, even when element dimensions are unknown or dynamically changing.

Core Flexbox Properties Overview

flex-direction: Establishes the main axis orientation (`row` vs `column`).
justify-content: Governs alignment along the primary flow axis.
align-items: Controls cross-axis alignment for immediate vertical or horizontal balance.
gap: Modern native spacing between items without margin bleed.

Frontend UI Scenarios

✓
Responsive Navbar Alignment
Effortlessly configure logo, navigation links, and action buttons using `space-between` and vertical centering.
✓
Product Card Grid Wraps
Build flexible card grids that wrap gracefully across mobile screens with uniform gaps without CSS float hacks.
✓
Centering Divs (Dead Centering)
Achieve perfect horizontal and vertical centering with `justify-content: center` and `align-items: center` in two clicks.
✓
Sidebar & Content App Shells
Structure multi-column dashboard layouts with direction columns and dynamic stretch items.

Key Generator Features

✓

Real-Time Visual Interactive Canvas

Watch flex items rearrange instantly in an animated preview container as you tweak direction, alignment, and gaps.

✓

Dynamic Flex Item Counter

Add or remove flex items on the fly to test how wraps behave with 1, 4, 8, or 12 elements.

✓

Clean Production-Ready CSS

Generates standards-compliant, lightweight CSS rules with zero unnecessary vendor prefixes.

✓

100% Client-Side Privacy

Experiment with layouts locally with zero network tracking and instantaneous UI response times.

Frequently Asked Questions

What is the difference between justify-content and align-items?

In CSS Flexbox, `justify-content` controls alignment along the main axis (horizontal in row mode, vertical in column mode). `align-items` controls alignment along the perpendicular cross axis.

Why should I use gap instead of margin in flexbox?

The CSS `gap` property applies spacing only between flex items without applying awkward margin offsets to the outer edges of the first and last child elements, eliminating the need for `:first-child` or `:last-child` CSS resets.

What is the difference between flex-direction: row and column?

`row` places items horizontally from left to right. `column` stacks items vertically from top to bottom. Adding `-reverse` flips the placement order.

Is Flexbox supported by all modern browsers?

Yes! CSS Flexbox is supported by 100% of modern web browsers across desktop and mobile devices including Chrome, Safari, Firefox, Edge, and iOS WebKit.