Offline 3DS ROM Decryption Tool - GameBrew

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

3DS] ROM Trimming Tutorial

List of 3DS PC utilities - GameBrew

Citra Special] How to DECRYPT 3DS ROM without a 3DS console on PC

Rom tool 3DS - GameBrew

How To Decrypt 3DS

Tutorial + Tool] Offline 3DS ROM Decryption Tool

How To Decrypt 3DS

Utilities - DecEboot

How to decrypt a .3ds or .cia file and use it with Citra

How to decrypt a .3ds or .cia file and use it with Citra