PageSpeed Insights
pagespeed.web.dev
Scores a page on real-user Core Web Vitals and lab measurements
No sign-up
Loading page
wave.webaim.org
Overlays accessibility errors directly on top of the page they affect.
WebAIM's evaluator: enter a URL and it renders the page with icons pinned to the elements that fail — missing alt text, empty links, skipped headings, low-contrast text — plus a structural view of the heading order and a contrast checker. Showing errors in place rather than as a list is why it teaches faster than a report does. Automated testing catches roughly a third of real accessibility problems; keyboard and screen-reader testing is still on you.
AltFTool does this too
If you would rather not leave the site, Accessible Document Checker covers the same job here — free, no account, and it runs in your browser.
Open Accessible Document CheckerQuestions
Works the moment the page loads. No account, no email, no trial. Automated checks find only a fraction of accessibility issues, and pages behind a login need the browser extension.
Yes. WAVE sends your input to its own servers to process it. That is fine for public material; for anything containing personal data, use one of the on-device tools instead.
Automated checks find only a fraction of accessibility issues, and pages behind a login need the browser extension.
Alternatives
Same category or same task, ordered by how closely they overlap.
pagespeed.web.dev
Scores a page on real-user Core Web Vitals and lab measurements
ssllabs.com
Grades a site's TLS configuration from A+ down to F and says why
securityheaders.com
Grades the HTTP security headers a site sends and names the missing ones
webpagetest.org
Loads your page from a chosen city and browser and films the result
downforeveryoneorjustme.com
Settles whether a site is actually down or only down for you
lookup.icann.org
The registry's own WHOIS record for a domain, with no upsell