The Screaming Frog SEO Spider serves as an effective website crawler designed to enhance onsite SEO by extracting essential data and identifying common SEO problems. Users can download and crawl up to 500 URLs at no cost, or opt to purchase a license to eliminate this limitation and gain access to more advanced features. This tool is robust and adaptable, efficiently navigating both small and extensive websites while providing real-time analysis of the gathered data. By collecting crucial onsite information, it empowers SEO professionals to make well-informed decisions. Users can quickly crawl a website to uncover broken links (404 errors) and server issues, with the option to bulk export these errors along with their source URLs for resolution or to share with developers. It also aids in finding both temporary and permanent redirects, as well as identifying redirect chains and loops, and allows for the uploading of URL lists for auditing during site migrations. Additionally, during a crawl, the tool evaluates page titles and meta descriptions, helping to pinpoint those that may be too lengthy, too short, missing, or duplicated throughout the site, ultimately improving the overall SEO performance. This comprehensive approach ensures that users are equipped to optimize their websites effectively.