WCAG Compliance Checker for Websites
Audit any web page against Web Content Accessibility Guidelines (WCAG 2.2 Level AA). Instantly identify programmatic accessibility barriers, low contrast text, missing form labels, and broken ARIA markup.
- No credit card required
- 60 second average scan
- Real browser scan
- WCAG 2.2 checks
Automated Testing Scope
What Our WCAG Compliance Checker Tests
CompliantScan uses real browser automation to execute client-side JavaScript, rendering pages exactly as modern browsers display them before running deterministic WCAG 2.2 rules.
Programmatic Form Labels
Identifies form fields, select menus, and checkboxes missing explicit <label> tags, aria-label attributes, or valid aria-labelledby associations.
Color Contrast Ratios
Calculates text and background color contrast ratios to ensure compliance with WCAG 2.2 AA requirements (4.5:1 for regular body text, 3:1 for large text).
Alternative Text & Descriptions
Flags informative images missing alt attributes, decorative images missing empty alt="" strings, and redundant alt descriptions.
Heading Hierarchy & Structure
Inspects structural document outlines (<h1> through <h6>) for skipped heading levels, missing main headings, and missing lang tags.
ARIA Roles & Focus Targets
Detects invalid ARIA roles, un-namable button icons, duplicate DOM element IDs, and interactive controls unreachable by keyboard.
Landmark Region Markup
Verifies semantic HTML layout containers (<header>, <main>, <nav>, <footer>) to guarantee proper assistive navigation landmarks.
Automated Testing Does Not Guarantee Full Legal Compliance
Automated WCAG compliance checkers evaluate around 30% to 40% of total WCAG success criteria. While automated scanners are fast and essential for catching code-level violations at scale, machine algorithms cannot determine if alternative text accurately describes an image contextually, if video captions match spoken dialogue, or if complex navigation menus make logical sense to a screen-reader user.
To achieve thorough accessibility and minimize ADA legal exposure, agencies should always pair automated WCAG scans with focused manual testing, including keyboard-only navigation and native screen reader passes.
Agency Field Guides
Step-by-Step Accessibility Guides for Web Agencies
Explore our agency resources to build a consistent, repeatable WCAG testing workflow for client projects.
Website Accessibility Audit Checklist for Web Agencies
A practical, 10-part checklist covering representative page sampling, automated scans, manual review, and presenting WCAG findings to clients.
Read the website accessibility audit checklist →Automated vs Manual Accessibility Testing Guide
Learn what automated tools catch, what requires human review, and how agencies combine both methods for defensible client audits.
Read the automated vs manual testing guide →Ready to Run a WCAG Scan Across Your Client Sites?
Use CompliantScan to discover automated WCAG 2.2 issues, track compliance scores, and generate client-ready executive reports.