$ python uf2_decompile.py firmware.uf2 extracted.bin Found 128 blocks, family ID = 0xE48BFF56 Reassembled 32768 bytes -> extracted.bin (base 0x10000000)
For ARM Cortex-M architectures, the Vector Table sits at the very beginning of the mapped flash memory address:
While there isn't a single "decompiler" that converts machine code directly back to C++ code, several tools can extract the raw binary, which can then be disassembled. 1. uf2conv.py (The Official Converter)
UF2 Report ---------- File: blink.uf2 Blocks: 32 Family: RP2040 (0xE48BFF56) Target range: 0x10000000 - 0x10002000 Binary size: 8192 bytes uf2 decompiler
To extract the raw data from a .uf2 file, you need a utility that can "unpack" it.
Decompiling a UF2 file requires a two-step process: converting the UF2 container into a raw binary or ELF file, and then loading that binary into a disassembler or decompiler.
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 . $ python uf2_decompile
A UF2 file isn't a single blob; it’s a series of 512-byte blocks containing headers, footers, and raw data. To "decompile" the file, you first have to : This Python tool is the standard for converting files back into raw (binary) or
No standalone “UF2 to C” decompiler exists – and likely never will, due to architecture variability.
At its core, UF2 is a "container" format for microcontroller firmware, not a compiled program in itself. Its primary purpose is to simplify the process of uploading code to a device. A UF2 file is a contiguous sequence of 512-byte blocks, each of which is self-contained and independent of the others. Decompiling a UF2 file requires a two-step process:
Even with advanced tools, the result is and often requires hours of manual annotation.
Created by the NSA, Ghidra is the most robust free tool available for microchip decompilation.