QUICK ANSWERStart with the tool that matches your immediate input.
Open CSS Box Shadow Generator first when its stated purpose matches the result you need now. Use CSS Gradient Generator only when it solves a separate next task.
This guide is for developers, analysts, testers, and technical writers. Start with CSS Box Shadow Generator when your immediate task is to open the original CSS Box Shadow Generator and complete the task with a focused browser-based interface. Move to CSS Gradient Generator only when you also need to open the original CSS Gradient Generator and complete the task with a focused browser-based interface.
The goal is not to run two tools automatically. It is to finish the first narrow task, inspect its result, and then decide whether CSS Gradient Generator solves a genuinely different next step.
Both tools sit in Developer & Data, but they handle different inputs or outcomes. Keeping those roles separate reduces repeated work and makes verification easier.