Practical guidance
Back up the working configuration before editing. Test exact paths and query strings, plus HTTPS and www variants. htaccess rules do not automatically apply to Nginx, which needs its own configuration.
Before using this tool
Define what you need from htaccess builder 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.