In the world of digital preservation, we often treat file formats like immutable laws of nature. An NSP (Nintendo Submission Package) is seen as the "digital" version—the software downloaded from a server. An XCI (NX Card Image) is the "physical" ghost—a 1:1 clone of a game cartridge. To the casual observer, they are just different suffixes, but to the enthusiast, they represent a fundamental shift in how we interact with digital media.
because no file ever leaves your computer, yet it operates inside your browser like a web app.
runs directly on a modded Switch console. It's the "source" tool, designed to dump your legally owned games directly from a cartridge or system memory to an XCI or NSP file.
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Check the box that says Patch to XCI . You can also tick Trim to reduce file size.
Hosting a server that processes terabytes of game data daily is financially unviable for free sites.
For power users, NSCB is a command-line tool. However, several third-party websites have created web wrappers for NSCB. These websites take your uploaded NSP, run it through a backend server running NSCB, and give you a download link for the XCI.
Before diving into converters, you must understand the source material.