WCAG Accessibility Checker

WCAG Accessibility Checker compared with Deque axe DevTools, Siteimprove and SortSite
WCAG Accessibility Checker	Deque axe DevTools	Siteimprove	SortSite
Standards covered: AChecker checks against WCAG 2.0, Section 508, the German BITV and the Italian Stanca Act, and it analyses HTML, CSS and XHTML. WCAG 2.1 and 2.2 are not listed in the W3C tools entry.	Standards covered: The axe-core engine covers WCAG 2.0, 2.1 and 2.2 at levels A, AA and AAA. Its stated aim is zero false positives, with uncertain cases flagged for manual review.	Standards covered: States that every fix is checked against WCAG but does not specify versions or levels. It lists support for ADA Title II, Section 508 and the European Accessibility Act.	Standards covered: About 320 tests for WCAG 2.2, 310 for 2.1 and 300 for 2.0, plus ARIA 1.3, Section 508 (2017) and EN 301 549. It checks HTML, CSS, JavaScript, PDF, GIF and Word files.
Scope and method: A hosted service that reports the details and locations of problems for the URL you submit. The W3C entry lists the host as achecker.achecks.ca, created by Cantan Group, with a last update recorded in 2021.	Scope and method: The free extension runs basic automated tests page by page. The Pro extension adds guided testing, user flow testing and Jira integration, and the bundle adds linters, CI/CD and API integration.	Scope and method: Continuous monitoring of web pages, PDFs, documents, mobile apps and authenticated pages, with integrations for VS Code, Figma and CI/CD through an MCP server.	Scope and method: Desktop and OnDemand products. You enter a website address and the tool crawls the whole site, then reports problems by page and by affected code.
	Manual review: Guided testing in the Pro tier supports manual checks. Unclear results are marked for human review.	Manual review: Certified specialists test with screen readers, magnification and keyboard-only navigation, and their findings sit in the same record as the automated ones.	Manual review: The vendor states that some issues require human judgment and cannot be tested automatically.
Licence and cost: Free software and open source, with the repository at github.com/cg-a11y/AChecker. The submission does not name the licence.	Licence and cost: axe-core is open source and the Free extension costs nothing. Pro has a 14-day trial, and the bundle requires a demo request. No prices are listed.	Licence and cost: Commercial platform, sold after a demo request, with no prices listed. Free checkers and a free Digital Insights Report are offered.	Licence and cost: Standard, Professional and Developer are sold as one-time per-seat licences. A 30-day money-back guarantee applies.

WCAG Accessibility Checker compared with Deque axe DevTools, Siteimprove and SortSite

WCAG Accessibility Checker

Deque axe DevTools

Siteimprove

SortSite

Standards covered: AChecker checks against WCAG 2.0, Section 508, the German BITV and the Italian Stanca Act, and it analyses HTML, CSS and XHTML. WCAG 2.1 and 2.2 are not listed in the W3C tools entry.

Standards covered: The axe-core engine covers WCAG 2.0, 2.1 and 2.2 at levels A, AA and AAA. Its stated aim is zero false positives, with uncertain cases flagged for manual review.

Standards covered: States that every fix is checked against WCAG but does not specify versions or levels. It lists support for ADA Title II, Section 508 and the European Accessibility Act.

Standards covered: About 320 tests for WCAG 2.2, 310 for 2.1 and 300 for 2.0, plus ARIA 1.3, Section 508 (2017) and EN 301 549. It checks HTML, CSS, JavaScript, PDF, GIF and Word files.

Scope and method: A hosted service that reports the details and locations of problems for the URL you submit. The W3C entry lists the host as achecker.achecks.ca, created by Cantan Group, with a last update recorded in 2021.

Scope and method: The free extension runs basic automated tests page by page. The Pro extension adds guided testing, user flow testing and Jira integration, and the bundle adds linters, CI/CD and API integration.

Scope and method: Continuous monitoring of web pages, PDFs, documents, mobile apps and authenticated pages, with integrations for VS Code, Figma and CI/CD through an MCP server.

Scope and method: Desktop and OnDemand products. You enter a website address and the tool crawls the whole site, then reports problems by page and by affected code.

Manual review: Guided testing in the Pro tier supports manual checks. Unclear results are marked for human review.

Manual review: Certified specialists test with screen readers, magnification and keyboard-only navigation, and their findings sit in the same record as the automated ones.

Manual review: The vendor states that some issues require human judgment and cannot be tested automatically.

Licence and cost: Free software and open source, with the repository at github.com/cg-a11y/AChecker. The submission does not name the licence.

Licence and cost: axe-core is open source and the Free extension costs nothing. Pro has a 14-day trial, and the bundle requires a demo request. No prices are listed.

Licence and cost: Commercial platform, sold after a demo request, with no prices listed. Free checkers and a free Digital Insights Report are offered.

Licence and cost: Standard, Professional and Developer are sold as one-time per-seat licences. A 30-day money-back guarantee applies.