Press J to open the Social menu in Path of Exile 2, which is where you can access party features and public parties. Some guides also mention S , but J is the most commonly cited hotkey in the sources I found.

Quick use

  • Open the Social screen with J.
  • Go to the party/public party section from there.
  • Invite a friend by right-clicking their name and choosing Invite to Party.

Note

If your keybinds were changed, the menu may be mapped differently on your setup, but the default reference here is J.

Default key: J.