Audit any website’s technical SEO, free.

In our own tests on a typical small site, 25 pages took 2 to 3 minutes and 100 pages 8 to 9 minutes. When other free audits are running, yours runs alongside them, which can make it take twice as long, or waits in line until one finishes and then starts by itself. A site with slow pages takes longer too: each page is loaded in a browser, three pages at a time, with up to 90 seconds for each page. The results page fills in as pages are checked, and shows its place in line while it waits.

It starts at the home page of the site you enter and follows any redirect of that page, then stays on the final host: another subdomain is another site. From there it follows the site’s internal links, its sitemaps and the canonical and alternate URLs its pages declare, up to 25 URLs in all, the home page included.

Yes. Every page is requested as DiscoveredByBot/1.0 (+https://discoveredby.ai), and robots.txt is read again before each URL: a URL it disallows for DiscoveredByBot is not fetched. Requests to common analytics and tag-manager services are blocked during the render, so an audit does not add page views to tools such as Google Analytics.

Anyone who enters the same site sees the same results until they are deleted: a site holds one free audit at a time. The results page asks search engines not to index it, and it never shows who asked for the audit or any email address.

The crawl data is kept while a crawl waits or runs, then deleted 48 hours after the crawl whose results the audit shows finishes. If the first crawl saves no page, for example because robots.txt disallows the home page, its data is deleted at once. A new free audit of the site can start once the data is deleted.

On the results page, enter your email address and we send you a 6-digit code. Enter the code, and the audit is upgraded, once, to a new crawl of up to 100 pages, and every verified address gets the report by email when that crawl finishes. Once an audit has had its upgrade, verifying an address gets that address the report. The “Send me occasional product updates” box is unticked unless you tick it.

It is the same crawler with the same 238 rules. In a DiscoveredBy project on Starter, Growth and Pro, the site audit crawls as many URLs as you choose, up to 1,000, keeps your newest 10 audits, lets owners and editors record a decision on each issue, and feeds the page issue queue.