Directly converting PS3 games into a PS4 PKG for native playback is not possible due to the radical difference in hardware architecture between the two systems. While you can convert PS3 "folder" games into PS3 PKGs for use on a modded PS3, these files will not run on a PS4.
. Because the two consoles use entirely different processor architectures (PS3's convert ps3 games to ps4 pkg best
Requirements: A jailbroken PS4 (typically running GoldHEN), a USB hub, a keyboard/mouse, and a high-speed USB drive. Process: Directly converting PS3 games into a PS4 PKG
If you want to create PKG files for homebrew or PS2/PSP games on a jailbroken PS4, search for “PS4 PKG Tool” and “PS4 Fake PKG Generator” guides on trusted console modding forums (like PSX-Place or GBAtemp). Because the two consoles use entirely different processor
For standard consoles, you cannot "convert" files yourself, but you can access games through official channels: