hextrakt is described as 'strong SEO crawler for windows, which can crawl very big websites, thanks to its new adaptive & asynchronous technology. Free version is limited to 20 000 URLs, unlimited crawls, including powerful URL explorer and export'. There are six alternatives to hextrakt for a variety of platforms, including Online / Web-based, SaaS, Google Chrome, Mac and Windows. The best alternative is Screaming Frog SEO Spider. It's not free, so if you're looking for a free alternative, you could try Checkbot or Website Crawler. Other great apps like hextrakt are CrawlCenter (Freemium), SEOBLAZER (Paid) and SiteCozy broken link checker (Paid).
Boost your SEO, speed and security: Checkbot for Chrome crawls your site to test you’re following over 50+ best practices. Test 1,000s of pages in minutes for broken links, duplicate content, invalid HTML, insecure forms, redirect chains and more.
This is a web-based application that reviews web pages and reports URL errors from webpage, image, iframe URLs including broken links, timeout links, redirection loops, mixed content errors, DNS errors, server errors.