PDF Accessibility Checker by WebYes

PDF Accessibility Checker by WebYes is a free online tool that scans PDF documents for accessibility issues that can make them difficult for people with disabilities to read or use. It detects problems such as missing image descriptions and heading issues, highlights affected content on the page, organizes findings by severity, and provides guidance on how to fix each issue. It also flags items that require human review. Users can upload PDFs up to 50 MB or paste a public link, with no sign-up or email required and no files stored. Checks are performed against WCAG 2.1 AA and PDF/UA standards.