Open DevTools

Cmd+Option+IOpen DevTools
Cmd+Option+JOpen Console panel
Cmd+Option+COpen Elements panel (inspect mode)
F12Toggle DevTools
Cmd+Shift+CToggle inspect element mode

Elements Panel

Up / DownNavigate DOM nodes
RightExpand node
LeftCollapse node
EnterEdit attribute
F2Edit as HTML
HToggle element visibility
DeleteDelete element
Cmd+ZUndo

Console

Ctrl+LClear console
TabAutocomplete suggestion
UpPrevious command in history
DownNext command in history
Shift+EnterMulti-line entry
Cmd+KClear console (alternative)

Sources Panel

Cmd+POpen file
Cmd+Shift+PRun command
Cmd+GGo to line
F8Pause / Resume script
F10Step over
F11Step into
Shift+F11Step out
Cmd+BToggle breakpoint
Cmd+\Pause on exceptions

Network Panel

Cmd+EStart / Stop recording
Cmd+KClear requests
Cmd+FSearch network requests
RReplay XHR request

General DevTools

Cmd+[Previous panel
Cmd+]Next panel
Cmd+Shift+DToggle dock position
Cmd+Shift+MToggle device mode
EscToggle console drawer
?Open Settings