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How to check a website, investigate errors and track changes.
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Check the domain name in the certificate SAN, send the correct SNI during TLS checks, and fix HTTPS on the main domain, www and CDN without bypassing the error.
How to find HTTP requests from a widget on an HTTPS page, check the initiator and nested resources after a click, and replace the source with a working secure URL.
How to measure DNS, connection, TLS, and time to first byte during a timeout, record the time and error, and send your hosting provider the details needed to check server logs.
How to check the alt text for a product’s main photo, details, and diagrams after import, preserve manual descriptions, and keep decorative images’ alt text empty on the next update.
How to find the actual URL selected for a broken photo, check the CDN response and source file, fix the path, and keep thumbnails and the gallery working.
How to compare card width, screen density, and the selected file, configure srcset and sizes, and reduce downloads while keeping photos sharp and available in a larger view.
How to identify a product page’s LCP element, understand delays in the main photo request, configure its loading and priority, and keep the rest of the gallery slides working.
How to choose a response for a moved, empty, or deleted category, check the old URL and a suitable replacement, and update links and the sitemap without blanket redirects.
How to check a new service page’s public response, robots, noindex, and canonical settings, review its content from a customer’s perspective, and add internal links before requesting indexing.
Why contacts/ opens an incorrect nested URL from a catalog page. Check the base URL and resolved href, fix the shared link and preserve the page language.
Open a tool for the task described in the article.