Tests all 50 WCAG 2.1 Level A & AA criteria

Free WCAG Compliance Checker

Instantly validate your website against WCAG 2.1 Level AA — the international standard for web accessibility. Get actionable results in 60 seconds.

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The 4 WCAG Principles

WCAG 2.1 is built on four core principles. Our checker tests all of them automatically.

Perceivable

Information must be presentable to users in ways they can perceive.

  • Alt text for images
  • Captions for videos
  • Color contrast ratios
  • Text resize support

Operable

UI components and navigation must be operable by all users.

  • Keyboard navigation
  • No seizure-inducing content
  • Skip navigation links
  • Sufficient time limits

Understandable

Information and UI operation must be understandable.

  • Clear language
  • Consistent navigation
  • Error identification
  • Form labels and instructions

Robust

Content must be robust enough for assistive technologies.

  • Valid HTML
  • ARIA labels
  • Status messages
  • Name, role, value

WCAG Conformance Levels

WCAGsafe checks Level A and AA — the legally relevant standard.

Level A

Minimum accessibility. Required for basic access.

30 success criteria

We test this
Level AA

Standard compliance. Required for ADA/legal compliance.

20 success criteria

We test this
Level AAA

Enhanced accessibility. Best practice but not legally required.

28 success criteria

Why WCAG Compliance Matters

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Legal Protection

WCAG 2.1 AA is the standard used by courts and the DOJ for ADA compliance. Meeting it protects you from lawsuits.

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1.3 Billion Users

Over 1 billion people worldwide have a disability. Accessible websites reach more customers and improve UX for everyone.

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SEO Benefits

Many WCAG requirements — like alt text, semantic HTML, and fast load times — directly improve your Google rankings.

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