Allows switching between ISO and CSO formats. Rename: Change the displayed name of the ISO. Delete: Remove the ISO file directly. Important Considerations
Download the ISO Tool 131 zip file (ensure you get it from a reputable source like PSPISO or a dedicated homebrew site). Extract: Extract the file on your PC. Connect PSP: Connect your PSP to your computer via USB.
To save space, select “CSO Compression” from the main menu. You will be asked for a compression level (1 = fastest/largest, 9 = slowest/smallest). Level 4 is the sweet spot for speed vs. size.
The utility serves as a Swiss Army knife for PSP enthusiasts, offering several critical functions for game preservation and accessibility: iso tool 131 pspiso
A: An ISO is an exact, uncompressed copy of a UMD. A CSO is a compressed version of an ISO. CSO files take up less space on your Memory Stick but may have slightly longer loading times in some games.
: One of its most famous uses was the "Prometheus" patch, which allowed newer games requiring higher firmware versions to run on older Custom Firmware (CFW) like 5.00 M33-6 or 5.50 GEN-D3.
This was the most common workflow for users looking to play new games. Allows switching between ISO and CSO formats
The PSPISO is not properly decrypted, or the firmware is too low. Fix: Re-run EBOOT Decrypt, then apply Patch Prometheus – Version 5 or 6. Ensure your CFW is at least 6.60.
: Compress bulky .ISO files into .CSO (Compressed ISO) format to save valuable storage space.
(developed by Takka) is a highly regarded utility for the PlayStation Portable (PSP) that serves as an all-in-one management suite for game images. It is primarily used to decrypt, patch, and convert ISO files directly on the handheld console without requiring a PC. Key Features Important Considerations Download the ISO Tool 131 zip
When newer games refused to boot on older CFW, ISO Tool became the premier solution. Version 1.31 marked a highly stable milestone that allowed users to decrypt, patch, and convert game files directly inside the PSP's XMB menu. Key Features of ISO Tool
Renames files, changes file headers, and manages ISO files directly from the XMB (XrossMediaBar). Key Features of ISO Tool 131