NSZ to NSP Converter

Purpose & User Intent: The NSZ to NSP Converter Online solves the need to decompress NSZ backed Nintendo Switch packages into NSP files. Target users include archive conservators, researchers, game enthusiasts, and backup managers who require NSP outputs from NSZ backups for testing, storage, or installation workflows. It addresses the problem of converting a compressed NSZ package into a standard NSP while preserving binary integrity and file layout. It supports single-file conversion and batch processing, with optional integrity verification and export of checksums.\n\nCore Logic & Features: The tool accepts binary NSZ inputs, validates headers, decompresses data using a zstandard-based pipeline, and re-packages the result as an NSP package. Required features include file upload handling, decompression, NSP packaging, and binary output generation. Optional/advanced features include batch queuing, streaming processing for large files, checksum generation (SHA-256), size estimation, and post-conversion verification. It provides clear error codes for corrupted inputs, unsupported NSZ versions, or insufficient permissions, and returns per-file outputs with optional metadata.\n\nInputs & Outputs: Inputs: NSZ_file (type: file/blob; units: none; sample: \"game.nsz\"; required: true; validation: NSZ signature check and version guard). Outputs: NSP_file (binary; units: none; formatting: raw NSP binary; naming: derived from input with .nsp extension). The tool can also emit a hash (SHA-256) for integrity.\n\nAlgorithms & Calculations: Decompression uses the NSZ payload layout; blocks are decompressed via a zstandard-based stream, followed by NSP packaging that preserves file boundaries and headers. Optional hash = SHA-256(input) or output; Output size is reported; If multiple files are processed, per-file results include individual sizes and hashes.\n\nError & Edge Cases: Invalid input or missing file yields an immediate error without output. Corrupted NSZ inputs or unsupported versions trigger specific failure codes and no NSP output. Very large NSZ sizes may trigger chunked processing with memory safeguards. External data unavailability is handled with timeouts and retries where applicable.\n\nIndustry/Region & Localization: Uses standard binary file handling concepts across regions; no currency or locale-specific units; ensure compliance with local laws regarding handling of copyrighted game content. The tool does not perform license validation or content verification beyond file integrity checks.\n\nAssumptions & Exclusions: Assumes user has legal rights to transform NSZ to NSP and intends to use NSP within legitimate contexts. Excludes UI behavior details, licensing constraints, or any activity that bypasses content protections. No UI styling or front-end logic is described.