Draw a molecule, or pick one from the library, and switch the layers on: the hybrid orbitals of each atom, the σ and π bonds they overlap into, the lone pairs left over, and the molecular orbitals a calculation gives for the same structure.
Everything is computed in the page. The 3D geometry comes from MMFF94 or GFN2-xTB, the hybridisation from the structure itself, and the molecular orbitals from Extended Hückel theory, in eV. Nothing is sent anywhere.
Atomic orbitals, hybridisation and molecular orbitals, computed and drawn in your browser. The tool needs JavaScript and WebGL2; these are the pages it offers: