Flexbox Generator

When to use?

Use it to build a Flexbox layout, checking each property's effect with a preview and generating CSS. Great for visualizing confusing flex properties.

How to use

• Choose flex-direction, justify-content, align-items, and gap.
• Check the item layout live in the preview.
• Copy the generated Flexbox CSS.

Input Explanation

Choose the flex container's flex-direction, justify-content, align-items, and gap with radio buttons.

Calculation Basis

It builds a .container { display: flex; flex-direction: ... } CSS string from the selected options and applies it to the preview DOM element to render the layout.

Usage Examples

• Experiment with layouts - Change Flexbox options to see the layout and CSS.
• Quick pre-deploy check - Check inputs and output to reduce errors before dev/ops work.
• Aid docs/reviews - Copy the result into dev docs, issues, or review comments.

Examples

• justify-content: center, align-items: center → code that centers children vertically and horizontally
• justify-content·align-items center → children centered

Cautions

• Generated output is for reference; test carefully before production use.
• Specific specs or framework-only syntax may cause compatibility issues.

Guides

Core Flexbox properties

Combine flex-direction (main axis), justify-content (main-axis alignment), align-items (cross-axis alignment), and gap (child spacing) to build most layouts.

Use the visual preview

Changing a property updates the preview instantly. Copy the generated CSS to apply directly in your project.

FAQ

Is there a preview?

Yes, it shows the layout of 3 items instantly.

What does flex-direction change?

row lays items horizontally, column vertically, and reverse flips the order.

Is item spacing adjustable?

Adjust the gap value with a slider to set spacing between children.

Do I apply the code to the parent?

display: flex and alignment properties must be on the parent (container) wrapping the children.

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