Free Online CSS Responsive Breakpoint Generator Tool

Generate CSS Flexbox layouts online instantly with this free CSS Flexbox Generator. Use the tool below to create flexible rows, columns, alignment, spacing, wrapping and clean flexbox CSS code for your website or app interface.

CSS Flexbox settings

Create flexbox layouts with direction, wrapping, alignment, gaps and export-ready CSS snippets.

Flex controls

Adjust the main flexbox properties and item dimensions.

Items 8
Gap 16px
Item width 120px
Item height 82px
Radius 18px
Container padding 16px

Live preview

Preview your flexbox layout as cards, navbar, centered content, gallery or sidebar.

display: flex; justify-content: center; align-items: center;

Generated CSS

Flex shorthand display: flex;

Saved flexbox layouts

Recent and favorite flexbox presets are saved locally in this browser.

Recent layouts

Favorite layouts

What is a CSS Flexbox Generator?

A CSS Flexbox Generator is an online tool that helps you create flexbox layouts visually. Instead of writing flexbox CSS manually, you can adjust direction, wrapping, justification, alignment, gaps and item behavior, preview the layout and copy the generated CSS code.

CSS Flexbox is a layout system designed for arranging items in one direction: either a row or a column. It is commonly used for navigation menus, buttons, cards, forms, toolbars, headers, footers, icon lists, pricing sections and responsive UI components.

This CSS Flexbox Generator runs directly in your browser, making it fast and simple to create flexbox layouts without installing software.

What can you use it for?

You can use this online flexbox layout generator to create horizontal layouts, vertical layouts, centered elements, responsive rows, wrapped card groups, navigation bars, button groups, form rows, icon lists, dashboard controls and modern UI components.

For example, you may want to center a button inside a container, align cards in a row, create a responsive navigation menu, stack items vertically, distribute space between elements or wrap items across multiple lines on smaller screens.

How to use the CSS Flexbox Generator

Step 1: Choose the flex direction

Select whether your flex items should flow in a row, column, reversed row or reversed column.

Step 2: Adjust alignment and spacing

Use the controls to change justify-content, align-items, flex-wrap, gap and other flexbox settings.

Step 3: Copy the CSS code

Preview the layout and copy the generated Flexbox CSS. Paste it into your stylesheet, component, page builder, theme or frontend project.

CSS flexbox options

This CSS Flexbox Generator can help with common layout tasks such as:

  • Generate CSS Flexbox layouts
  • Create flex rows
  • Create flex columns
  • Center elements with Flexbox
  • Align items horizontally
  • Align items vertically
  • Adjust justify-content
  • Adjust align-items
  • Adjust flex-direction
  • Adjust flex-wrap
  • Adjust flex gap spacing
  • Create responsive flex layouts
  • Create button groups
  • Create navigation bars
  • Create card rows
  • Create form rows
  • Preview flexbox layouts live
  • Generate clean CSS code
  • Copy flexbox CSS instantly
  • Use the tool without installing software

The final CSS output may depend on the values you choose, the flex container, child elements, available space and how the generated code is applied in your project.

What is CSS Flexbox?

CSS Flexbox is a layout model that helps arrange elements inside a container. It is especially useful when you need to align, distribute or reorder items in one direction.

A flex container can place items in a row or column. It can also control how items are spaced, aligned, wrapped and stretched.

Flexbox is widely used in modern web design because it makes many common layout tasks easier, such as centering content, creating navigation bars, aligning buttons, building card rows and designing responsive interface components.

Basic CSS Flexbox example

A simple flexbox layout starts with display: flex.

.flex-container {
  display: flex;
  gap: 16px;
}

This turns the element into a flex container and places its direct children in a row by default.

To center items both horizontally and vertically, you can use:

.flex-center {
  display: flex;
  justify-content: center;
  align-items: center;
}

This is one of the most common flexbox patterns.

Common CSS Flexbox examples

Horizontal row

A basic row layout places items from left to right.

.row {
  display: flex;
  flex-direction: row;
  gap: 16px;
}

This works well for navigation menus, buttons, cards, icons and horizontal UI groups.

Vertical column

A column layout stacks items from top to bottom.

.column {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

This works well for cards, forms, sidebars, panels and stacked content blocks.

Centered layout

Flexbox can center content inside a container.

.centered {
  display: flex;
  justify-content: center;
  align-items: center;
}

This is useful for hero sections, buttons, modals, empty states and loading screens.

Space between layout

The space-between value distributes items with space between them.

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

This is common for headers, navigation bars, toolbars and top sections.

Wrapped flex layout

Flex items can wrap onto new lines when there is not enough space.

.flex-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

This is useful for tags, cards, buttons, filters, chips and responsive item groups.

Main flexbox properties

display: flex

The display: flex property turns an element into a flex container.

display: flex;

Once this is applied, the direct children become flex items.

flex-direction

The flex-direction property controls the direction of the flex items.

flex-direction: row;

Common values include row, row-reverse, column and column-reverse.

justify-content

The justify-content property controls alignment along the main axis.

justify-content: center;

Depending on the flex direction, this can align items horizontally or vertically.

align-items

The align-items property controls alignment along the cross axis.

align-items: center;

This is commonly used to vertically center items in a row layout.

flex-wrap

The flex-wrap property controls whether items stay on one line or wrap onto multiple lines.

flex-wrap: wrap;

This is useful for responsive layouts where items need to move to the next line on smaller screens.

gap

The gap property controls spacing between flex items.

gap: 16px;

Using gap is often cleaner than adding margins to each item.

align-content

The align-content property controls spacing between multiple flex lines when wrapping is enabled.

align-content: center;

This only has an effect when there is extra space and multiple flex lines.

Flexbox alignment explained

Main axis

The main axis follows the flex-direction. If the direction is row, the main axis is horizontal. If the direction is column, the main axis is vertical.

The justify-content property controls alignment on the main axis.

Cross axis

The cross axis runs perpendicular to the main axis. If the direction is row, the cross axis is vertical. If the direction is column, the cross axis is horizontal.

The align-items property controls alignment on the cross axis.

Understanding the main axis and cross axis makes flexbox much easier to use.

justify-content values

flex-start

Items are placed at the start of the main axis.

justify-content: flex-start;

center

Items are centered along the main axis.

justify-content: center;

flex-end

Items are placed at the end of the main axis.

justify-content: flex-end;

space-between

Items are distributed with equal space between them.

justify-content: space-between;

space-around

Items are distributed with space around each item.

justify-content: space-around;

space-evenly

Items are distributed with equal space around and between all items.

justify-content: space-evenly;

align-items values

stretch

Items stretch to fill the cross axis.

align-items: stretch;

flex-start

Items align at the start of the cross axis.

align-items: flex-start;

center

Items align in the center of the cross axis.

align-items: center;

flex-end

Items align at the end of the cross axis.

align-items: flex-end;

baseline

Items align based on their text baseline.

align-items: baseline;

Flexbox item properties

Flexbox also includes properties for individual flex items.

flex

The flex shorthand controls how an item grows, shrinks and sets its base size.

.item {
  flex: 1;
}

This makes items share available space evenly.

flex-grow

The flex-grow property controls how much an item can grow.

.item {
  flex-grow: 1;
}

flex-shrink

The flex-shrink property controls how much an item can shrink.

.item {
  flex-shrink: 0;
}

flex-basis

The flex-basis property sets the initial size of an item before extra space is distributed.

.item {
  flex-basis: 240px;
}

align-self

The align-self property lets one item override the container’s align-items value.

.item {
  align-self: flex-end;
}

Responsive Flexbox example

A responsive flex layout can wrap items and give them flexible widths.

.card-row {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
}

.card-row > * {
  flex: 1 1 260px;
}

This creates a flexible card row where each item can grow, shrink and wrap depending on the available space.

This pattern is useful for cards, features, pricing blocks, service sections, product previews and dashboard widgets.

Flexbox vs CSS Grid

Flexbox

Flexbox is best for one-dimensional layouts. It works well when items need to flow in a row or a column.

Use Flexbox for navigation bars, button groups, centered content, form rows, icon lists, toolbars and simple responsive components.

CSS Grid

CSS Grid is best for two-dimensional layouts. It controls rows and columns at the same time.

Use CSS Grid for page layouts, card grids, galleries, dashboards, product grids and more structured layout systems.

Both are useful. Many modern websites use CSS Grid for larger page structure and Flexbox for smaller component alignment.

Why use a CSS Flexbox Generator?

A visual CSS Flexbox Generator helps you create flexbox layouts faster. Instead of guessing alignment values or rewriting flexbox syntax by hand, you can adjust controls visually, preview the result and copy the CSS when it looks right.

This is useful for designers, developers, students, frontend builders, WordPress users, Elementor users and anyone creating responsive layouts.

It can also help you learn flexbox by showing how properties such as justify-content, align-items, flex-direction, flex-wrap and gap affect the layout.

Flexbox design tips

Use gap for spacing

The gap property keeps spacing clean and consistent between flex items.

Use flex-wrap for responsive rows

When items need to adapt to smaller screens, flex-wrap: wrap; can help them move onto new lines naturally.

Use flex-direction carefully

Remember that changing flex-direction also changes how justify-content and align-items behave.

Use flex: 1 for equal items

If you want items to share available space evenly, flex: 1; can be a simple solution.

Avoid overcomplicating layouts

Flexbox is excellent for one-direction layouts. If you need complex rows and columns together, CSS Grid may be a better choice.

Test on real screen sizes

Always check how flex layouts behave on mobile, tablet and desktop widths.

Common breakpoint use cases

For navigation bars

Create header layouts, menus, logo and navigation alignment, mobile nav rows and toolbar sections.

For buttons

Align button groups, CTA rows, icon buttons, form buttons and action bars.

For cards

Create flexible card rows, wrapped cards, equal-height card groups and responsive content blocks.

For forms

Align labels, inputs, buttons, search bars, filters and form action rows.

For centering content

Center modals, empty states, hero content, loaders, icons and call-to-action blocks.

For dashboards

Arrange controls, stat cards, toolbar actions, widgets and compact UI groups.

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Frequently Asked Questions

Is this CSS Flexbox Generator free?

Yes. This CSS Flexbox Generator is completely free to use.

No. You can generate CSS Flexbox layouts directly in your browser without installing software.

CSS Flexbox is a layout system that helps arrange items in a row or column and control alignment, spacing and wrapping.

display: flex turns an element into a flex container and makes its direct children flex items.

Yes. You can center items with justify-content: center; and align-items: center;.

Yes. Flexbox can create responsive layouts using flex-wrap, gap, flexible item sizes and media queries.

justify-content controls how flex items are aligned and distributed along the main axis.

align-items controls how flex items are aligned along the cross axis.

flex-direction controls whether flex items flow as a row, row reverse, column or column reverse.

flex-wrap controls whether flex items stay on one line or wrap onto multiple lines.

Yes. After creating your flexbox layout, you can copy the generated CSS code and use it in your project.

Yes. You can copy the generated CSS and use it in WordPress, Elementor, custom CSS fields, blocks, themes or frontend projects.

Flexbox is best for one-dimensional row or column layouts. CSS Grid is best for two-dimensional layouts with rows and columns together.

Yes. CSS Flexbox is widely supported in modern browsers.

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Need more CSS utilities? Explore our free design tools to create grid layouts, responsive breakpoints, clamp values, buttons, gradients, shadows, border radius values, transforms, animations, easing curves and modern responsive UI faster.

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