| Feature | 7z Archive | NDS ROM (.nds) | |----------------|--------------------------------------|--------------------------------------| | Purpose | Lossless compression & archiving | Executable game image for NDS hardware/emulators | | Internal data | Any files (text, ROMs, etc.) | ARM9/ARM7 binaries, headers, FAT tables, game assets | | Magic bytes | 37 7A BC AF 27 1C | First 12 bytes = Nintendo logo decryption header | | Can be run | ❌ No | ✅ Yes (on emulator or flashcart) |
It is also essential to address the security and legal dimensions of this process. Malicious actors often disguise malware as “7z to NDS converters” to exploit unsuspecting users. Reputable users never need an exotic, dedicated converter; standard, well-known archiving tools like 7-Zip are sufficient. Therefore, any website offering a standalone “converter” executable should be treated with extreme caution—it is almost certainly a virus or adware. Legally, while converting one’s own legally obtained backup of a Nintendo DS cartridge (where permitted by law) is defensible, downloading commercial NDS ROMs from the internet infringes on copyright. The technical ability to extract an NDS from a 7z archive does not grant legal permission to do so. 7z to nds converter