SEO Site Audit tool by Ahrefs
https://ahrefs.com/site-audit
WEBCheck your website for 160+ pre-defined SEO issues. Site Audit automatically groups issues by type and pulls printable reports – all fully visualized with colored charts. Check for issues related to: Performance: slow pages, too-large CSS or HTML. HTML tags: missing, duplicate or non-optimal length of title tags, meta descriptions and H1 tags.
DA: 100 PA: 67 MOZ Rank: 23