Colour Contrast Checker
Check text and background colours against WCAG AA and AAA, with a live preview.
Open the contrast checkerAccessibility Resources
Checklists, certification study guides, a glossary and hands-on tools — all free, no sign-up required. The two products we build are listed at the end.
Free tools
Hands-on tools that run right in your browser.
Heading & Alt-Text Checker
Paste HTML to check heading structure and find images missing alt text.
Open the heading checkerAccessibility Statement Generator
Generate a ready-to-use website accessibility statement in minutes.
Open the generatorBulk Accessible PDF Generator
Turn a CSV into a ZIP of tagged, accessible PDFs — one per row.
Open the PDF generatorAll free tools
Browse the full set of A11ytek's free accessibility tools.
View all toolsChecklists & guides
Plain-English guides to the standards and the work.
WCAG 2.1 AA Checklist
What WCAG 2.1 Level AA asks for, organised by the POUR principles.
Read the checklistAODA Compliance Checklist
Who must comply in Ontario, the WCAG standard required, and how to meet it.
Read the checklistPDF Accessibility Checklist
The 12 steps to a WCAG- and PDF/UA-compliant PDF.
Read the checklistAccessible Documents Guide
Make accessible Word, PowerPoint, and Excel files and export clean PDFs.
Read the guideAccessibility Glossary
Key accessibility terms defined in plain English.
Open the glossaryCertification study guides
Preparing for an IAAP exam? Start here.
CPACC Study Guide
How to pass the foundational IAAP CPACC exam.
Read the guideWAS Study Guide
How to prepare for the technical Web Accessibility Specialist exam.
Read the guideADS Certification Guide
What the Accessible Document Specialist credential involves.
Read the guideCPACC vs WAS vs CPWA
Which IAAP certification to take, and how they fit together.
Compare themTools we build
Everything above is free. These two are paid products — both let you try them before you pay.
Exam Prep App
16,000+ verified practice questions for CPACC, WAS and ADS, each with an explanation. Try 60 free, no card needed.
Open the prep appA11ytek Monitor
Continuous accessibility monitoring, hosted and managed by us — your site crawled on a schedule, every page tested against WCAG, and your score tracked over time. Also available self-hosted for closed networks.
See what it does