i3 - WCAG 2.1 AA Checker

Comprehensive WCAG 2.1 Level AA accessibility audit. Checks all A and AA success criteria and provides remediation guidance.

**i3 — WCAG 2.1 AA Checker** *The most thorough automated accessibility auditor for Chrome* --- **Make your websites accessible to everyone — instantly.** i3 – WCAG 2.1 AA Checker audits any web page against all **WCAG 2.1 Level A and Level AA** success criteria in seconds, right from your browser. Whether you're a developer, designer, QA engineer, or accessibility specialist, this extension gives you the detailed, actionable feedback you need to build inclusive, compliant web experiences. --- **WHY i3?** Accessibility isn't optional. Over 1 billion people worldwide live with a disability, and WCAG 2.1 AA compliance is legally required in many countries (ADA, EN 301 549, AODA, and more). i3 puts a full-scale accessibility audit in your toolbar — no paid subscriptions, no external tools, no setup required. --- **WHAT IT CHECKS — 50+ AUTOMATED TESTS ACROSS ALL 4 WCAG PRINCIPLES** 🔵 **Perceivable** - Missing or inadequate image alt text (1.1.1) - Missing video captions and audio descriptions (1.2.2, 1.2.5) - Form labels, table headers, heading order, and landmark structure (1.3.1) - Viewport orientation lock detection (1.3.4) - Missing autocomplete on personal data fields (1.3.5) - Color contrast — 4.5:1 for normal text, 3:1 for large text (1.4.3) - Non-text contrast for form controls (1.4.11) - Reflow and fixed-width layout issues (1.4.10) - Text spacing overflow issues (1.4.12) - Images of text detection (1.4.5) - Content on hover/focus review (1.4.13) 🟢 **Operable** - Keyboard-inaccessible clickable elements (2.1.1) - Character key shortcut detection via `accesskey` (2.1.4) - Skip navigation link presence (2.4.1) - Missing, empty, or generic page titles (2.4.2) - Generic link text ("click here", "read more") (2.4.4) - Heading structure and multiple H1 issues (2.4.6) - CSS `outline:none` on focus rules (2.4.7) 🟡 **Understandable** - Missing or empty `html[lang]` attribute (3.1.1) - Empty `lang` on page elements (3.1.2) - Auto-navigation on select change (3.2.2) - Required fields without error description links (3.3.1) - Missing format hints on pattern-validated inputs (3.3.3) 🔴 **Robust** - Duplicate `id` attributes across the page (4.1.1) - Buttons, custom widgets, and broken ARIA references (4.1.2) - Missing live regions on notification/status elements (4.1.3) --- **KEY FEATURES** ✅ **Compliance Score** — A 0–100 score ring gives you an instant health indicator for any page ✅ **Element Highlighter** — Click "Highlight on Page" to scroll directly to the failing element with a visual outline ✅ **Principle Filtering** — Filter results by Perceivable, Operable, Understandable, or Robust ✅ **Severity Filter** — Sort by Errors, Warnings, and Info with live counts ✅ **Live Search** — Instantly search across issue titles, descriptions, and remediation guidance ✅ **Actionable Remediation** — Every issue includes a clear, step-by-step fix — not just a problem label ✅ **JSON Export** — Export the full audit report for documentation, ticketing, or CI/CD integration ✅ **Works on Any Page** — Audits any URL including localhost, staging environments, and behind-login pages --- **WHO IS THIS FOR?** - 👨‍💻 **Front-end Developers** — Catch accessibility bugs before code review - 🎨 **UI/UX Designers** — Validate contrast ratios and semantic structure - 🧪 **QA Engineers** — Add accessibility to your manual testing checklist - ♿ **Accessibility Specialists** — Use as a first-pass scanner before manual or AT testing - 📋 **Product Managers & Compliance Teams** — Get a quick compliance snapshot for any page --- **WCAG 2.1 COMPLIANCE MADE SIMPLE** WCAG (Web Content Accessibility Guidelines) 2.1 is the internationally accepted standard for web accessibility, published by the W3C. Level AA is the benchmark required by most legal frameworks. i3 covers every automatable A and AA success criterion — giving you the most complete browser-based audit available. --- **PRIVACY** i3 does not collect, transmit, or store any personal data or browsing history. All audit processing happens entirely on your local machine. No account required. --- **GET STARTED IN SECONDS** 1. Install the extension 2. Navigate to any web page 3. Click the i3 icon in your toolbar 4. Hit "Scan Page" and review your results Build better. Build inclusive. Build with i3.