Microcontroller firmware differs fundamentally from desktop applications. Desktop binaries (like Windows EXEs or Linux ELF files) contain complex headers that tell the operating system exactly where to load code into RAM and where execution begins.
However, if someone ships a proprietary binary in a UF2 file, the format doesn't magically grant IP protection. It is merely a container. Building a decompiler democratizes the inspection of what is running on your hardware . uf2 decompiler
: Converting the .uf2 container back into a standard binary ( .bin ) or hexadecimal ( .hex ) format. It is merely a container
The next 4 bytes indicate the (the address where the execution starts).Jump to the address listed in the Reset Vector to find the absolute entry point of the firmware ( main or the boot initializers). 2. Cross-Reference Peripheral Registers The next 4 bytes indicate the (the address
The first phase of the decompilation pipeline is stripping away the UF2 headers and reconstructing a continuous raw binary image based on the target addresses specified within the blocks.
Because UF2 is a standard container, removing it is straightforward. These tools convert .uf2 back to a standard raw .bin format. 1. makerdiary/uf2utils (Python)
A is used to reverse-engineer UF2 files, which are common USB flashing formats for microcontrollers like the Raspberry Pi Pico. Because UF2 files contain compiled machine code (binary), "decompiling" them typically happens in two stages: first, converting the UF2 back into a raw binary format, and then disassembling that binary into human-readable assembly or C code. Essential Tools for UF2 Reverse-Engineering