There are many automated tools available to inspect your code. Automated tools can only catch a subset of all accessibility issues, but the ones they do catch are often the biggest blockers and the easiest issues to fix. When using these tools, it is important to inspect the DOM, not just the source code. Your scan should include representative samples of all page types and/or application states.
Checklist
Automated Code Inspection checklist (Google sheet)
Resources
Scanning service:
- Siteimprove for University of California sites (requires campus authentication)
Browser extensions:
- Siteimprove Accessibility Checker for Chrome
- Tenon Check for Chrome, Firefox, and Opera
- Deque aXe for Chrome and Firefox
- WebAIM Wave toolbar
Command-line tools: