What does the css accessibility scanner actually check?

It focuses on the core accessibility pattern for that task and returns practical results you can act on immediately, but it should still be paired with real product testing.

Can I use this output directly in production?

You can use it as a strong starting point, but you should still review the generated code or findings in the context of your design system and user flows.

Will this guarantee WCAG compliance?

No single tool can guarantee compliance. It improves accuracy and speed, but manual review and assistive-technology testing still matter.

Code

CSS Accessibility Scanner

Scan CSS for focus, motion, sizing, clipping, generated-content, and readability risks.

Input panel

Paste CSS

Accessibility report

6 issues detected — 0 critical, 1 serious, 3 moderate, 2 minor.

Critical: 0
Serious: 1
Moderate: 3
Minor: 2
Info: 0

Focus outline removed on line 1
Removing outline can make keyboard focus invisible unless an equivalent replacement exists.
SeriousWCAG 2.4.7 WCAG 2.4.11
```
button:focus { outline: none; }
```
Fix: Use :focus-visible with a high-contrast outline or box-shadow.
Motion may need reduced-motion fallback on line 2
Long, looping, or continuous animation should respect prefers-reduced-motion.
ModerateWCAG 2.2.2 WCAG 2.3.3
```
.ticker { animation: flash 500ms infinite; }
```
Fix: Add @media (prefers-reduced-motion: reduce) overrides.
Very small font size on line 3
Small text can be hard to read and may fail when users zoom.
ModerateWCAG 1.4.4
```
.card { height: 40px; overflow: hidden; font-size: 11px; }
```
Fix: Use readable sizes and test zoom to 200%.
Fixed dimension requires reflow review on line 3
Fixed sizes can clip content or prevent 320px reflow depending on context.
MinorWCAG 1.4.10 WCAG 1.4.4
```
.card { height: 40px; overflow: hidden; font-size: 11px; }
```
Fix: Prefer min/max constraints, flexible layouts, and content-tested dimensions.
Overflow hidden requires text clipping review on line 3
Hidden overflow can crop enlarged text, focus rings, or translated content.
MinorWCAG 1.4.4 WCAG 2.4.11
```
.card { height: 40px; overflow: hidden; font-size: 11px; }
```
Fix: Confirm no text or focus indicator is clipped at zoom and text spacing.
Motion CSS without reduced-motion query
Static CSS shows motion but no prefers-reduced-motion fallback.
ModerateWCAG 2.3.3
Fix: Add a reduced-motion media query that removes non-essential motion.

Manual testing panel

Check actual computed focus styles in the browser.
Zoom to 200% and test text spacing overrides.
Enable reduced motion and confirm essential content remains usable.

Actual resultNotes and evidence

Editorial guidance

How this code tool supports accessibility work

The css accessibility scanner is designed to turn a common accessibility review task into a repeatable workflow. It focuses on scan css for focus, motion, sizing, clipping, generated-content, and readability risks. The goal is not to replace expert judgment, but to make the first review faster, more consistent, and easier to explain to designers, developers, QA teams, and content owners.

Use the output as evidence for a remediation conversation. A failed check normally means the implementation needs a closer look against WCAG 1.4.4, 1.4.10, 1.4.12, 2.3.3, 2.4.7, while a passing check means the specific automated rule did not find a problem. Passing automated checks is helpful, but it is not the same as a full conformance claim.

For best results, test real production markup instead of simplified snippets. Templates, CSS state, JavaScript behavior, responsive layouts, and content changes can all affect the final accessibility experience. Re-run the tool after fixes so the before-and-after evidence is easy to compare.

Pair this tool with manual keyboard testing, zoom and reflow checks, screen-reader review, and content judgment. Those human checks catch issues that automated logic cannot reliably infer, such as whether labels are meaningful, instructions are clear, or a complete user task can be finished without a mouse.

How to use

1Open the css accessibility scanner and enter the page content, settings, or code you want to test or generate.
2Review the result cards, scores, or generated code to identify the safest accessible option before implementation.
3Copy the recommended fix or starter markup, then validate it again in your real product with keyboard and assistive technology testing.

FAQs

Tips here are tailored for the css accessibility scanner so people can move from checking to fixing faster.

What to verify manually

Keyboard: move through the related flow with Tab, Shift+Tab, Enter, Space, Escape, and arrow keys where the pattern expects them.

Assistive technology: check names, roles, states, reading order, announcements, and focus changes with at least one screen reader.

Content quality: confirm that instructions, labels, headings, errors, and alternatives make sense in the real user task.

This page is written as practical guidance, not a legal certification. For procurement, VPAT/ACR work, or regulated launches, combine tool output with expert review and documented manual test results.

Related learning

Input panel

Accessibility report

Focus outline removed on line 1

Motion may need reduced-motion fallback on line 2

Very small font size on line 3

Fixed dimension requires reflow review on line 3

Overflow hidden requires text clipping review on line 3

Motion CSS without reduced-motion query