Online Accessibility Checker

This tool analyzes a website URL or HTML snippet for automated accessibility issues in line with WCAG criteria. It targets web developers, QA engineers, accessibility consultants, and product teams who need reliable, repeatable checks during development, testing, or before release. It produces a structured, machine-readable report with per-criterion status, locations, and actionable remediation guidance, enabling faster, measurable improvements to inclusive web experiences.

Conceptually, the engine maps each automated check to WCAG success criteria, assessing semantic HTML, proper landmark usage, ARIA attributes, keyboard focus order, and visible text alternatives. It computes a pass/fail for each criterion, assigns a rationale, and aggregates results into an overall score. It also reports contrast ratios for color pairs and flags missing or misleading accessible names. Advanced options let users tailor level (A, AA, AAA) and simulate different viewport sizes.

Outputs include an overall score, a list of violations with DOM locations and impacts, and remediation guidance. Reports can be exported as JSON, CSV, or human-readable documents for CI pipelines and stakeholder reviews. The tool handles common edge cases such as dynamic content, blocked resources, and cross-origin restrictions; when data cannot be fetched, it records the issue rather than failing the analysis.

Use cases include sprint readiness checks, CI gate automation, accessibility dashboards, and external audits. The approach emphasizes automated detection with actionable recommendations while acknowledging limitations and recommending manual testing for perceptual and ergonomic aspects.