Mend by Harpoon: Accessibility Audit

Mend finds accessibility issues on the page you're testing and tells you exactly how to fix them. Open the side panel, click Run audit, and Mend scans the active tab against WCAG. Issues are grouped by rule and sorted by severity, then by where they appear on the page. Each one opens with the fix first, in plain language, with a copy-paste before-and-after example. Click Highlight on page to see the exact element. Audits run entirely on your device and no account is required. Optionally, connect a free Mend account (mend-a11y.com) and your audit results save to your own dashboard so you can track fixes over time — nothing is sent anywhere unless you set that up, and auto-save can be turned off in settings. Free and open source.