Most SEO tools hand you a score and expect you to trust it. Seodar shows the arithmetic: 100 minus weighted penalties, capped per category, with all 195 checks named in public. It crawls after JavaScript runs, so it measures the page a visitor actually gets, and it says what it could not reach instead of quietly scoring it anyway. Accessibility is in the same crawl, not a separate product: axe-core against WCAG 2.2, every finding citing its criterion. Free scan of 25 pages, no account.