QUICK ANSWERStart with the tool that matches your immediate input.
Open Accessible Table Checker first when its stated purpose matches the result you need now. Use HTML Table Generator only when it solves a separate next task.
This guide is for designers, developers, editors, and site owners. Start with Accessible Table Checker when your immediate task is to check common accessible table issues and receive practical improvement guidance. Move to HTML Table Generator only when you also need to use the HTML Table Generator to inspect, transform, validate, or generate developer data locally in your browser.
The goal is not to run two tools automatically. It is to finish the first narrow task, inspect its result, and then decide whether HTML Table Generator solves a genuinely different next step.
These tools cross two task areas. Use the second only when the first result creates a clear need for the next task.