Alt Text Quality Checker
Detect missing, suspicious, too-long, or filename alt text. Scan a URL or paste HTML directly.
- 1Choose input method — Use 'Scan URL' for a live page (full URL with https://), or 'Paste HTML' to check a specific section of code.
- 2Run the scan — Click 'Analyse'. The tool extracts every <img> tag and evaluates the alt attribute against WCAG 1.1.1 Non-text Content (Level A).
- 3Review each image — Images are classified into 7 categories: Missing (no alt attribute at all), Empty (alt="" — correct for decorative images), Pass (good descriptive alt), Suspicious (generic text like 'image' or 'photo'), Filename (alt matches the image filename), Too Short (under 3 characters), and Too Long (over 150 characters).
- 4Fix and re-test — Update the alt text in your code for each flagged image. Decorative images should use alt="" (empty string, not missing). Informative images need descriptive text. Functional images (linked) must describe the destination or action.
Batch scan up to 20 URLs
Pro: scan entire domains, export branded PDF reports, and get AI-suggested alt text for every image.
Normative Requirement — SC 1.1.1
SC 1.1.1 Non-text Content (Level A) requires all non-text content to have a text alternative that serves the equivalent purpose. Decorative images must use alt="". Informative images need descriptive alt text. Functional images (e.g. linked images) must describe the function, not the appearance.
Automated checking cannot verify semantic accuracy
This tool detects the presence or absenceof alt text and flags empty or missing attributes. It cannot determine whether the alt text accurately describes the image's meaning, purpose, or context — that requires human review. WCAG SC 1.1.1 requires alt text to serve the “equivalent purpose”; only a human reviewer can assess equivalence. Do not use automated pass results as evidence of SC 1.1.1 conformance.
Important Legal Disclaimer
This tool is a self-assessment aid only and does not constitute legal advice or a formally certified compliance assessment. Outputs — including reports, scores, checklists, and accessibility statements — are for internal use and should be reviewed by a qualified legal representative or independent accessibility auditor before being relied upon for regulatory, procurement, or public-disclosure purposes. All assessment risk lies with the internal assessor. accessibilityref, its developers, and staff accept zero liability for losses arising from use of or reliance on these outputs. Always verify against official sources: the W3C WCAG 2.2 Recommendation, the European Accessibility Act (Directive 2019/882), and your national enforcement authority.