The resulting output.bin is the raw ARM Thumb2 code, which can be loaded into tools like Ghidra. UF2 Structure and Technical Details
If you want to dive deeper into reverse engineering this specific firmware file, let me know:
Thus, the phrase “UF2 decompiler” is shorthand for the of converting UF2 → Raw Binary → Disassembly → Decompiled C.
Once you have the raw binary, you are no longer dealing with UF2. You are dealing with . Here is where the real tools live. uf2 decompiler
The most common approach is to use a or a decompiler . These tools analyze the machine code and attempt to reconstruct a human-readable representation.
Using this systematic conversion pipeline, any standard binary analysis utility functions perfectly as a complete UF2 decompilation suite.
The UF2 format, while designed for ease of use, is currently a . It lacks built-in encryption or integrity checks beyond the simple magic numbers. This is by design for its intended purpose, but it makes firmware extraction trivial for anyone with the file. The real security (or obfuscation) lies within the binary firmware payload itself. The resulting output
Many other tools also support extracting binary data from UF2 files:
Once you have the binary.bin , it is still in machine code (e.g., ARM Cortex-M0+). You need a disassembler to turn this into assembly code. Popular choices include:
If the Family ID was present in the UF2 file, you can often map this to a specific architecture. The uf2families.json database (used by uf2conv.py ) maps these IDs to known boards and their processors. You are dealing with
A specialized command-line utility for the Raspberry Pi Pico (RP2040/RP2350). It can inspect UF2 files, extract the binary, and even reveal embedded source code metadata if the developer left it enabled. 2. Advanced Decompilers
: Open Ghidra and start a new non-shared project.