Site Audit

Screaming Frog SEO Spider explained: what the 500-URL free version limits, first-crawl settings, the reports to check first and when to use another crawler.

Use a broken link checker the smart way: split internal, outbound and backlink 404s, rank fixes by traffic and links, then choose redirect, restore or remove.

Compare free SEO checker tools, learn why an SEO score isn't a Google metric, and see what a full-site crawl finds that a one-page scan can never catch on its

Ahrefs Webmaster Tools gives verified sites a free Site Audit and Site Explorer. See how to verify, what it checks, its limits and how it fits with Search

Open source SEO audit tools you can self-host: crawlers, Lighthouse-based auditors, the setup and upkeep each needs, and where a hosted audit tool helps.