Accessibility Tools

Free, client-side tools for testing accessibility. No data leaves your browser.

Contrast Checker

Check text contrast against solid colors, gradients, or uploaded images. Supports alpha compositing.

1.4.3 Contrast (Minimum)1.4.11 Non-text Contrast

Color Blindness Simulator

Upload an image and simulate how it appears under protanopia, deuteranopia, tritanopia, and achromatopsia.

1.4.1 Use of Color1.4.3 Contrast (Minimum)

Focus Order Visualizer

Paste HTML and see the keyboard tab order with numbered elements. Flags tabindex issues.

2.4.3 Focus Order2.4.7 Focus Visible2.1.1 Keyboard

Heading Structure Checker

Paste HTML or a URL, see the heading hierarchy tree, and find skipped heading levels.

1.3.1 Info and Relationships2.4.6 Headings and Labels

ARIA Validator

Paste HTML with ARIA attributes and validate against the WAI-ARIA specification.

4.1.2 Name, Role, Value4.1.3 Status Messages

Link Text Analyzer

Paste HTML or a URL to extract all links. Flags vague text like "click here" and duplicate labels.

2.4.4 Link Purpose (In Context)

Text Spacing Tester

Apply WCAG 1.4.12 text spacing overrides to any URL and check if content clips or overflows.

1.4.12 Text Spacing

Alt Text Reviewer

Paste HTML or a URL to extract all images and review their alt text. Flags missing, empty, and suspicious alt.

1.1.1 Non-text Content

Report Analysis

Upload an A11y Scan JSON report for a comprehensive analysis with prioritized fix instructions. Copy fixes for AI agents or GitHub issues.

Report Comparison

Upload two A11y Scan JSON reports and compare them. Track fixed, new, and unchanged violations over time.

Test Config Builder

Build a JSON test configuration for the A11y Scan extension. Step-by-step wizard for scan mode, viewports, timing, authentication, rules, and enriched export options.