Practical guidance
Inspect the final HTTP response as well as HTML. A well-designed page can still be excluded by X-Robots-Tag or reached through redirect chains. Check sitemap entries, language variants and canonical links separately.
Before using this tool
Define what you need from Technical SEO check and prepare the relevant input. When diagnosing a live service, record the test time and connection conditions so you can compare results after configuration changes. Check findings against the documentation for your software.
Tool availability
This is currently an information page. No working form, calculations or submission to diagnostic services is available yet. The interface and supported input formats will be documented when functionality is released.