Download the official firmware packager from the manufacturer’s support portal (requires a partner login for some devices).
This method only works if you have the vendor’s private signing key—otherwise, the device will reject the PAC as “invalid signature.” Method 2: Reverse-Engineering the PAC Structure (Advanced) When official tools aren’t available, you can manually convert using a hex editor and Python scripting. This is the hottest method among enthusiasts because it works for many legacy devices. how to convert bin file to pac file hot
Recalculate the checksum (often located in the last 4-16 bytes). Use a Python script like: how to convert bin file to pac file hot