Homebrew [Tutorial + Tool] Offline 3DS ROM Decryption Tool

[Smash73]

I would like to share a tool I've found in a certain forum.

This is Nintendo 3DS ROM Decryptor Python based tool, which even works offline. Mainly made for Citra.

Please use legal way to get game files before use this tool.

Features & Effects:
One key batch decrypt 3DS files.

Usage: Put your encrypted .3ds rom in Encrypted folder and run decrypt-all.cmd , you will find decrypted game in Decrypted folder.

Download: Click here

Authors:
Tom Muller - decrypt scripts and xorer.exe (3dsiso forum)
BrianTokyo - NDSTokyoTrim3.exe

FAQs​

Q: Does it work on CIA?
A: No, you need to convert .cia to .3ds using this tool here

Q: How long it takes?
A: Not much, depends on your ROM size.

Q: I can't find Decrypted rom in the folder!
A: Your ROM is already decrypted or new eShop format CIA. You need to visit this thread here.

Q: There is a video tutorial?
A: Yes, here it is on YouTube .

 

[Fl0x9]

At last you posted here after so many days? I've watched your video before.

 

[Smash73]

At last you posted here after so many days? I've watched your video before.

Yes, I forgot to post it here.

 

[spotanjo3]

Can you change decrypted back to encrypted roms ? If yes, how ?

 

[Smash73]

Can you change decrypted back to encrypted roms ? If yes, how ?

sorry, no.

 

[TurdPooCharger]

Can you change decrypted back to encrypted roms ? If yes, how ?

You can re-encrypt 3DS or CIA roms with GodMode9.

 

[spotanjo3]

You can re-encrypt 3DS or CIA roms with GodMode9.

yeah but I prefer PC. I do not have 3DS, thought.

 

[acrash]

is this tool more consistent than "Batch CIA 3DS Decryptor"?
Is it no-Intro compatible

 

[cheddrcheez]

hi I'm new to this, when I double click the decrypt all command it gives me this error

"The system cannot find the path specified.
Access is denied.
The system cannot find the file specified.
Press any key to exit"

could anyone tell me what I can do to fix this? I have a windows 11 laptop if that helps, I've been doing everything right the best I can I just want my silly childhood games :< any helps much appreciated

 

[adtsd]

hi I'm new to this, when I double click the decrypt all command it gives me this error

"The system cannot find the path specified.
Access is denied.
The system cannot find the file specified.
Press any key to exit"

could anyone tell me what I can do to fix this? I have a windows 11 laptop if that helps, I've been doing everything right the best I can I just want my silly childhood games :< any helps much appreciated

Try running as an administrator. You will need to type your password if you have one. Click "Yes" on the window that pops up.

 

[KornFlakes]

what does the "NDSTokyoTrim3.exe" file do? is it useful? or is it a virus? what is it?