About CSS Tabs Builder

Build an accessible tab bar with aria-selected styling + bottom accent. Part of the DevTools Surf developer suite. Browse more tools in the CSS collection.

Use Cases

• Frontend developers building accessible tab navigation with ARIA roles
• Designers prototyping tab bar styles for settings and content panels
• UI engineers creating consistent tab components for design systems
• Web developers generating accessible tabbed interfaces for documentation sites

Tips

• The generated tabs use aria-selected for proper accessibility semantics
• Customize the bottom accent bar color and thickness for active tab indication
• Adjust tab padding and spacing to fit your content width requirements

Fun Facts

• Tabbed interfaces were popularized by Apple's System 7 (1991) control panels, but the concept originated from physical manila folder tabs used in filing cabinets since the 1890s.
• WAI-ARIA's tabpanel pattern requires specific keyboard navigation: arrow keys to move between tabs, and Tab key to enter the panel content — most custom implementations get this wrong.
• A 2018 NN/g study found that horizontal tabs outperform vertical tabs for navigation efficiency, but vertical tabs are 17% faster when there are more than 7 items.

FAQ

Can tabs work without JavaScript?

Yes — via radio inputs with `display: none` and `:checked ~ .panel` sibling selectors. The tool generates both JS and pure-CSS versions.

Is the output accessible?

ARIA roles (tablist, tab, tabpanel) and aria-selected state changes are included. Keyboard navigation (Arrow keys) requires the JS version; CSS-only supports Tab but not arrow keys.

How many tabs can I have?

No hard limit, but 5–6 is the usability sweet spot. Past that, consider a dropdown or secondary navigation.

Does it support vertical tabs?

Yes — toggle layout to vertical. Tabs stack on the left, panels on the right. Good for settings pages and long-form content.