WCAG conformance checks
Check webpages against WCAG 2.0, 2.1, and 2.2 success criteria at A, AA, and AAA levels.
Accessibility Checker by WebYes
Freemium
Accessibility Checker by WebYesは、WebページのWCAG違反、コントラストの問題、構造上の懸念、選択したベストプラクティス項目を監査できる無料のChrome拡張機能です。開発者、デザイナー、QAチーム、監査担当者、サイト所有者、コンテンツ編集者がブラウザ上で素早くアクセシビリティを確認できます。
Accessibility Checker by WebYesとは？
Accessibility Checker by WebYes is a Chrome extension for running accessibility checks directly on webpages. It performs page-level checks against WCAG 2.0, 2.1, and 2.2 criteria across A, AA, and AAA conformance levels, with results intended to support preparation for ADA, EAA, and Section 508 requirements. The extension is designed for quick reviews without complex setup, DevTools, sign-in, or an account.
The extension combines issue detection with visual inspection tools. It can highlight affected elements, show heading structure, focus order, and ARIA landmarks, review image alt text, and test color contrast for text and interface elements. It also includes simulations for dyslexia, low vision, and color blindness, allowing teams to inspect pages from different user perspectives.
Accessibility Checker by WebYesでできること
Color contrast testing
Check text and UI element contrast, view WCAG AA and AAA pass/fail results, sample colors with an eyedropper, test alternatives, and copy HEX values.
Page structure visualization
Visualize ARIA landmarks, heading hierarchy, and keyboard tab order to review page organization and navigation.
Element and image review
Highlight issues on the page, inspect affected elements without opening DevTools, and review images together with their alt text.
Disability simulations and best-practice checks
Simulate dyslexia, low vision, and color blindness, while also identifying usability and inclusivity improvements beyond strict WCAG errors.
Exportable reports and layout testing
Download audit reports containing WCAG criteria, severity levels, affected code snippets, and recommendations, and test desktop and mobile page layouts.
利用シーン
“Development reviews”
Developers can run quick checks while building or revising a page, identify high-impact issues in the browser, and inspect the relevant page elements before a formal audit.
“Design validation”
Designers can test contrast alternatives, examine page structure, and use disability simulations to evaluate how visual decisions may affect different users.
“QA workflows”
QA engineers can add page-level accessibility checks to testing activities and use exported findings to communicate issues and recommendations.
“Audit preparation”
Accessibility auditors can perform rapid early-stage reviews, map findings to WCAG criteria, and share reports with developers, clients, or stakeholders.
“Content and site maintenance”
Website owners and content editors can review image alt text, structural signals, and basic accessibility issues without writing code or configuring a separate testing environment.
よくある質問
How do I start a check?
Install the extension from the Chrome Web Store, pin it to the Chrome toolbar, open the webpage to test, select the extension icon, and run the accessibility check.
Which standards does it check?
The extension lists checks mapped to WCAG 2.0, 2.1, and 2.2 success criteria at A, AA, and AAA conformance levels. It also describes the results as support for preparation related to ADA, EAA, and Section 508 requirements.
Does it require an account or send webpage data to an external service?
The publisher states that the extension runs locally in the browser, makes no external requests, does not collect or track user data, and does not require sign-in or an account.
Can I share the results?
Yes. The extension provides downloadable reports with audit issues, WCAG criteria, severity levels, affected code snippets, and best-practice recommendations.
Does a clean result prove legal compliance?
No. The publisher explicitly says that passing all checks does not guarantee full WCAG conformance or legal compliance under the ADA or EAA. Professional audits may still be needed.
クイック情報
- Category
- Accessibility
- Platform
- Google Chrome extension
- Primary users
- Developers, designers, QA teams, accessibility auditors, website owners, and content editors
- Testing scope
- WCAG 2.0, 2.1, and 2.2; A, AA, and AAA levels
- Workflow
- Run checks on an open webpage from the Chrome toolbar
- Privacy model
- Local browser analysis; publisher states no browsing-data collection or tracking
Accessibility Checker by WebYesの代替品
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