# nicoboss/nsz

NSZ - Homebrew compatible NSP/XCI compressor/decompressor

Repository: https://github.com/nicoboss/nsz
Canonical: https://ross.abutalabs.com/products/nsz
Language: Python
License: NOASSERTION
License Family: other
Last push: 2026-08-23T18:56:47+00:00

## Health v2 (maintenance only)
Score: 87/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 64, longevity 100
- inputs: {"age_days": 2528, "days_push": 10, "days_rel": 31, "gap_med": null, "n_releases_24m": 1}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2350, forks 145 (observed 2026-08-28T04:06:40.320805+00:00)

## What it is
NSZ is a Python tool with optional GUI that losslessly compresses and decompresses Nintendo Switch NSP/XCI game dumps using zstd, producing NSZ files installable by homebrew title installers. It requires a user-provided hactool-compatible keys file.

## Use cases
- compress nintendo switch nsp files to save disk space
- decompress nsz files back to nsp
- convert xci dumps to compressed nsz format
- compress switch game dumps for homebrew installers
- batch compress a library of switch roms

## When to choose
- you need lossless, homebrew-installer-compatible compression of Switch dumps
- you want a cross-platform CLI or GUI tool for NSP/XCI compression

## When to avoid
- you cannot legally obtain a hactool-compatible keys file
- you need compression for non-Switch file formats

## Facets
- artifact type: cli-tool
- maturity: active
- function: compression, cli, gui
- domain: gaming-tools, files, cross-platform
- platform: windows, python, cli
- tags: nintendo-switch, nsp, xci, nsz, zstd, homebrew, game-dumps, linux, macos

## Member repositories
- nicoboss/nsz (main) score 87

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:40.320805+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:36:56.236286+00:00, confidence not recorded.
  - readme: https://github.com/nicoboss/nsz (fetched 2026-08-28T04:06:40.320805+00:00, sha 4ab72dab2da1)
  - registry_pypi: https://pypi.org/pypi/nsz/json (fetched 2026-08-29T10:17:25.458480+00:00, sha a30f67bbc54b)
- Data as of 2026-08-30T08:39:29.467469+00:00.