WCAG 2.1 Validator

A fast, online validator that checks WCAG 2.1 compliance for web pages, guiding developers and testers toward accessible, compliant experiences.

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About This Tool

The validator checks WCAG 2.1 conformance for a provided URL or HTML snippet. It covers perceivable, operable, understandable, and robust criteria through automated checks, categorized by success criteria and techniques.
Conceptually, the tool analyzes documents by parsing markup, evaluating color contrast with established algorithms, validating semantic HTML, and verifying ARIA usage and keyboard focus order. It aggregates findings with severity and recommended fixes.
Who benefits: web developers, accessibility engineers, QA teams, product managers. Unique value: integrates automated checks with scoring, provides clear remediation steps, supports exportable reports for audits, and helps establish accessibility in CI pipelines.
Core features include per-criterion reporting, configurable scope, export formats (JSON/CSV), and optional deeper checks for dynamic content. Use cases: pre-release audits, compliance checks for contracts, remediation project tracking, and accessibility regression testing.

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How to Use

Provide inputs: enter the page URL or paste HTML snippet.
Choose scope (page, component, or site) and WCAG version
1 with desired conformance level (A/AA/AAA).
Run validation.
Review results: locate violations, read remediation notes, and apply fixes.
Re-run to verify conformance after changes.
Export the report as JSON or CSV for audits or CI integration.

Frequently Asked Questions

Find Quick Answers

What is WCAG 2.1 Validator?

The tool checks pages against WCAG 2.1 success criteria, identifies violations, provides recommended fixes, and produces an auditable report. It does not guarantee legal compliance, but it helps surface accessibility gaps for remediation.

Can it detect dynamic content accessibility issues?

It detects several dynamic scenarios such as focus order in rendered DOM and ARIA usage, but cannot simulate every runtime interaction; results should be complemented by manual testing and assistive technology testing.

How should results be interpreted?

Each finding is labeled with a criterion, a severity level, and a remediation note. Follow recommendations in priority order, verify fixes, and re-run until the report shows no critical issues or all are mitigated.

Can I integrate into CI/CD?

Yes, the tool outputs structured JSON/CSV reports that can be consumed by CI pipelines; store results as artifacts and gate releases based on defined accessibility thresholds.

Need to run multiple calculations?

Create a free account today to unlock unlimited daily runs, access advanced parameters, save your history, and request custom features.

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