a55uka/nup
NUP is a clean-room container format for unencrypted NX (Nintendo Switch 1/2) game dumps.
From the publisher
README & documentation
Source previewRead the project’s overview, installation instructions and usage examples. The original README is the source of truth.
A container for unencrypted Nintendo Switch / Switch 2 game dumps. Spec sheet: SPEC.md NUP is a clean-room container format for unencrypted NX (Nintendo Switch 1/2) game dumps. It stores ExeFS program files and full RomFS trees, this means it stores updates, base content and addons in one compressed file. It can be used for either Switch 1 or Switch 2 games, of course that means you would have to decrypt the game and package it into an nup. (which i am not aware of for Switch 1 Games). tools/nup/ is the Python reference implementation: pack discovers packages by directory layout: Anything else inside dlc/ (non-hex names, index dirs without exefs//romfs/) is skipped. Notes: first package in base-less dumps. from exefs/main…
Read the full README ↗ · Preview checked 2026-11-06T12:21:13.307Z
Inside the original README — Document outline
- NUP - NX Package Format
- Tools
- Packing a dump
- Inspecting
- Extracting
- Editing metadata after packing
- Verifying
- Layout
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Documentation belongs to its respective authors. Reported project/model license: MIT. A listing is not a grant of reuse or training rights. Confirm the document’s own terms at the source.
What this repository does
NUP is a clean-room container format for unencrypted NX (Nintendo Switch 1/2) game dumps.
Repository facts
- Owner
- a55uka
- Primary language
- Python
- Stars
- 322
- Forks
- 14
- Open issues + pull requests
- 10
- License
- MIT
- Archived
- No
- Default branch
- meow
- Created
- 2026-11-01T16:35:40.000Z
- Last push
- 2026-11-05T01:04:17.000Z
Topics and intended use
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Source and freshness
Source: GitHub. Metadata observed 2026-11-06T12:20:11.441Z. Daily imports are snapshots, not real-time monitoring.
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