Sixteen real 808 sounds.
Kick, snare, claps, hats, toms and cowbell, taken from recordings of the classic drum machine rather than imitated. The bottom four letter keys are the bottom row of pads, so the layout matches what you see.

An online drum machine: sixteen real TR-808 sounds, MPC layout, hit them with your keys.
Hit the pads with Z X C V, A S D F, Q W E R and 1 2 3 4 (bottom row first), or the same block on the right side of your keyboard. A MIDI pad controller works too. Only the 16 pads play. The knobs and other buttons are just for looks.
Online drum machine
Kick, snare, claps, hats, toms and cowbell, taken from recordings of the classic drum machine rather than imitated. The bottom four letter keys are the bottom row of pads, so the layout matches what you see.
Plug one in and the pads answer MIDI notes 36 to 51, the bank most controllers send. Edit pads lets you change any of them if yours is different.
Press Record, play a pattern, then download it as a WAV. Nothing to install, no account, and the file never leaves your computer.