Crawls a site and builds a sitemaps.org-compliant XML sitemap.
Same-site scope: only pages on the site you enter are included. www and non-www of the same domain count as one site, and the scope follows redirects — entering the non-www address of a www site now works. Why a site returns few URLs: some sites answer plain requests with a JavaScript challenge (Cloudflare, Sucuri, Turnstile) or ship an empty HTML shell that builds its navigation in the browser. The crawl report below tells you which one you hit. For challenge-protected sites, add a rendering API key above — ScraperAPI, ScrapingBee and Browserless all have free tiers.