Modders use these tools to extract game files, edit them (e.g., swapping character skins or changing music), and then repack them back into a .psarc format for the game to load.
Game developers use PSARC to bundle thousands of assets—textures, audio files, 3D models, scripts, and localization data—into a single, optimized package. This improves load times and protects game data from casual tampering.
Do not use online web-based extractors for PSARC files. Those are scams or malware vectors. Download a native executable.
If you are looking for a tool to extract these files, several well-known options exist within the modding community: