As of 2025, these are the most reliable techniques for converting BIN to PAC. They range from semi-automated tools to manual hex editing.
Prepared for: Technical Staff / Network Engineers
Date: April 12, 2026
Subject: Conversion of binary (.bin) firmware/configuration files to PAC (Proxy Auto-Config or firmware package) format
You cannot convert a single partition BIN into a full PAC. A PAC file requires all partitions: bootloader, nvram, prodnv, boot, recovery, system, vendor, userdata.
Alternative hot approach:
Use SPD UpgradeTool in "download only selected partition" mode. Flash your single BIN (renamed to correct partition name) alongside a stock PAC for the other partitions.
Squid sometimes stores ACLs in binary form. Use: how to convert bin file to pac file hot
squid -k parse -f proxy-rules.bin
Or convert the binary cache to text using squidclient mgr:config.
No software directly converts any random .bin to a .pac file because binaries are compiled machine code, and PAC files are human-readable scripts. The “hot” way is extraction + conversion.
If you’re looking for a ready-made PAC file, it’s often easier to write one from scratch using your proxy details (IP + port) and domain rules.
For developers or script-kitties wanting automation, the hottest approach in 2026 is using the spd_pac_tools Python scripts (available on GitHub—search SPD PAC Packer Unpacker). As of 2025, these are the most reliable
If you have a Samsung firmware file (usually ending in .tar.md5 or .bin from the AP folder) and you want to flash it on a SpreadTrum-based device, you cannot convert it directly to a .pac file easily. The hardware architectures are different.
However, if you are trying to flash a Samsung .bin file to a Samsung device:
Note: There’s no universal one-command “BIN→PAC” converter — you typically must wrap the BIN into a PAC with proper headers/partition table matching your device.
Obtain or recreate the scatter/loader info Or convert the binary cache to text using
Use a packer tool to create PAC
Example (conceptual; tool syntax varies):
packtool --scatter MTK_scatter.txt --input boot.bin:BOOT,system.bin:SYSTEM --output firmware.pac
Flash carefully