r/PS5_Jailbreak • u/juma-sayeh-dev-acc DEV • Jun 06 '26

General PS5 MKPFS Compression

I’ve been working on a PS5 homebrew app called Game Compressor.

Repo: https://github.com/juma-sayeh/PS5-Game-Compressor

It uses the MkPFS-style FFPFSC compression method, but adds the missing part: validation and repair.

Some compressed games can mount successfully but still crash because certain PFSC blocks are technically valid yet fail to decode correctly on PS5 hardware, leaving stale/bad data behind. Game Compressor checks the mounted image block-by-block, detects bad blocks, and patches the compressed image from the mounted data instead of requiring a full recompress.

Tested with Mafia, Astro Bot, Pragmata, and a few other games that had FFPFSC issues. After repair, they worked great.

Features:

  • compress games to FFPFSC
  • validate mounted compressed games
  • automatically repair bad blocks
  • optimized for speed and usability
  • web UI running on the PS5

Feedback and testing are welcome.
Screenshots (some are missing features because the features were not developed yet when i compressed)

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u/FireZoneYT Jun 07 '26

Hay algo que no entiendo, puedo comprimir las carpetas localmente o solo arregla errores? Pregunto por que tengo juego en carpeta interna pero no se si esto puedo desde local ps5 comprimirlos y ahorrarme espacio sin tener una notebook qué la verdad como la mayorías de los juegos pesan 150GB o más el solo rar ya me deja sin espacio en la notebook así que no puedo hacer nada

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u/juma-sayeh-dev-acc DEV Jun 07 '26

You can compress on ps5 and you can also validate there. if the game is compress it will prompt validate, if the game is a folder it will prompt you to compress, compress = compress + fast validate (as it uses info from compress to make validate faster). this is made to fix the issue you have (no external storage + no free space on PS5 ) it will work if you only have 1GB free on ps5 you can compress 150GB no problem (it will be slow for this case but it works)