How to use the CSS Flexbox Generator
What is the CSS Flexbox Generator?
The CSS Flexbox Generator is a free online CSS tool that lets you build CSS flexbox layouts visually. Configure properties such as flex-direction, justify-content, align-items, and flex-wrap through a simple GUI, preview the result in real time, and auto-generate the CSS code. No installation, no signup — it runs entirely in your browser.
Key features
- Visual control of flex-direction / justify-content / align-items / flex-wrap
- Per-item customization of order / align-self / flex
- Common presets such as navbar, centering, and card rows
- One-click copy of the generated CSS code
- Runs entirely in the browser (your code is never sent to a server)
When to use it
- Building horizontal navigation bar layouts
- Distributing card components evenly
- Centering elements horizontally and vertically
- Learning CSS Flexbox and checking how properties behave
How to use it (3 steps)
- Pick a preset or set the properties: choose a preset (Center, Space Between, etc.) or set flex-direction, justify-content, and align-items through the GUI.
- Check the preview and fine-tune: review the layout in the real-time preview and adjust per-item order, align-self, and flex.
- Copy the CSS code: copy the auto-generated CSS with the "Copy" button and paste it into your website.
Key properties at a glance
| Property | What it does | Common values |
|---|---|---|
flex-direction |
Sets the direction items are placed (the main axis) | row / row-reverse / column / column-reverse |
justify-content |
Aligns items along the main axis (e.g. horizontally) | flex-start / center / space-between / space-around |
align-items |
Aligns items along the cross axis (e.g. vertically) | stretch / center / flex-start / flex-end / baseline |
flex-wrap |
Controls whether items wrap onto multiple lines | nowrap / wrap / wrap-reverse |
gap |
Sets the spacing between items in one declaration | 10px / 1rem, etc. |
Flexbox vs. Grid
CSS Flexbox and CSS Grid are both layout modules, but they excel at different things. Flexbox is best for one-directional arrangements such as navbars and button groups, while Grid is best for two-dimensional layouts like a full page. Use the CSS Flexbox Generator for arrangements inside a component, and the CSS Grid Generator for full-page layouts.
Frequently asked questions
Q. What is the CSS Flexbox Generator?
The CSS Flexbox Generator is a free online tool for building CSS flexbox layouts visually. You set properties such as flex-direction, justify-content, and align-items through a GUI, and it auto-generates the matching CSS code.
Q. What is the difference between CSS Flexbox and CSS Grid?
CSS Flexbox is best for one-dimensional layouts (a single row or column), such as navbars and rows of cards. CSS Grid is best for two-dimensional layouts (rows and columns at once), which makes it ideal for full-page layouts.
Q. Is this tool free to use?
Yes, the CSS Flexbox Generator is completely free. No account is required — you can start building flexbox layouts right away in your browser.
Q. Can I use the generated CSS code as-is?
Yes, the generated CSS can be pasted directly into your website. You are free to use it on both commercial and personal sites.
Q. How do I center elements with Flexbox?
To center with Flexbox, set display: flex on the container, then use justify-content: center for horizontal centering and align-items: center for vertical centering. With this tool, the "Center" preset applies it in one click.