# What Is Keyboard Accessibility? Completing Tasks Without a Mouse

Last updated: 2026-09-30

Traditional Chinese version：[https://accesserty.com/ai/glossary/keyboard-accessibility.md](https://accesserty.com/ai/glossary/keyboard-accessibility.md)

Page version：[https://accesserty.com/en/glossary/keyboard-accessibility/](https://accesserty.com/en/glossary/keyboard-accessibility/)

Keyboard accessibility means users can complete core tasks with Tab, Shift + Tab, Enter, Space, and arrow keys without relying on a mouse.

## In brief

- Keyboard accessibility means a site works without a mouse.
- Interactive controls must be reachable, visible when focused, operable, and escapable.
- Include input, submission, error correction, and leaving components, not just pressing Tab to see focus move.

## Why it matters

Many users rely on keyboards, alternative input devices, or assistive technologies. If the main flow only works with a mouse, those users are blocked.

## What to check

Keyboard testing should walk through the main task, not only isolated controls.

For example, fill a form, submit it, handle errors, and return. Tab and Shift+Tab move focus; buttons typically activate with Enter or Space, links with Enter. Composites such as tabs use their own arrow-key pattern rather than a Tab stop for every child.

A modal dialog keeping Tab inside while open is expected, not automatically a keyboard trap. Users still need a usable way to close it and return to a sensible focus location.

- Logical tab order.
- Clear visible focus.
- Operable buttons, links, menus, and dialogs.
- No keyboard traps.

## Frequently asked questions

### Is mouse-only interaction accessible?

Usually no. Core functionality should be operable with a keyboard.

### What should keyboard focus review usually check?

Check focusable controls, task-appropriate order, visible focus, expected keys, and a way to leave the component. Static content does not all need a Tab stop.

### Does mouse operation prove keyboard accessibility?

No. Mouse operation does not prove keyboard operation. Accessibility testing still needs a keyboard walkthrough of core tasks to confirm focusability, operability, reasonable order, visible focus, and no traps.

## Related pages

- [Run a complete keyboard walkthrough](https://accesserty.com/en/guides/keyboard-accessibility-testing/)
- [Check focus order and return location](https://accesserty.com/en/guides/how-to-check-keyboard-focus-path/)
- [Accesserty DevCheck](https://accesserty.com/en/devcheck/)

## References

- [W3C Keyboard Compatibility](https://www.w3.org/WAI/WCAG22/Understanding/keyboard)