Server-side fetch + DOM parsing so it works even when browsers block cross-site crawling. (This is the standard pattern for extracting SEO signals.) [1](https://www.plus2net.com/php_tutorial/curl-webpage-auditor.php)
IdleTip: Try your own pages first
Note: Unhandled JS errors can break forms/buttons and even prevent content from rendering, which can harm UX and indexing; this tool avoids that by doing the crawl server-side and keeping the UI simple. [2](https://seositecheckup.com/tools/js-error-test/)[3](https://developers.google.com/search/docs/crawling-indexing/javascript/fix-search-javascript)