Boot9.bin 3ds May 2026

In the Nintendo 3DS scene, boot9.bin is a backup of the system's BootROM (specifically the ARM9 bootrom). It is one of the most critical files for advanced console management, decryption, and homebrew development because it contains the keys and code that run during the very first stages of the system's boot process.  What is boot9.bin? 

Part 3: How to Dump Boot9.bin (Safely)

Important disclaimer: Dumping boot9.bin requires that you already have custom firmware installed (Luma3DS + boot9strap). This guide assumes your 3DS is already hacked. If not, follow the official guide at https://3ds.hacks.guide. Boot9.bin 3ds

Output location: The file will appear in 0:/gm9/out/ (root of SD card, inside the gm9/out folder). In the Nintendo 3DS scene, boot9

If you have custom firmware installed, you can dump this file in seconds using Launch GodMode9 (usually by holding the button during boot). Navigate to [M:] MEMORY VIRTUAL , and select "Copy to 0:/gm9/out" Power off and find the file on your SD card in the Part 3: How to Dump Boot9

The BootROM contains Nintendo’s root of trust—private keys, cryptographic hashes, and validation routines. No software exploit can permanently alter it. However, in 2017, a monumental event changed everything.

To obtain this file from your own console, you typically use GodMode9, a powerful browser for your 3DS's NAND and SD card.