pipdeptree is best for inspecting what is already installed in a virtualenv (conflicts, cycles, --reverse). PyDeps.com is best for exploring any Python package without installing — interactive tree/graph, global reverse dependents, OSV CVEs, licenses, health grades, extras, and offline wheel bundles. Many teams use both.
The CLI package pydeps (thebjorn/pydeps) visualizes module import graphs in your codebase. PyDeps.com explores published Python packages.