Would you like help with (verified working) or installing homebrew PKGs on a jailbroken PS4 instead?

A direct "converter" is technically impossible because the PS3 and PS4 use entirely different processor architectures.

If you find a website offering a "PS3 to PS4 PKG Converter," look for these red flags: Human Verification

A guide for on your specific PS4 firmware.

PS3 to PS4 PKG converters are tools that take PS3 game data and convert it into a PS4-compatible package. These converters typically work by: