Copies physical Universal Media Discs (UMDs) directly from the PSP drive straight to the digital memory card. How to Install ISO Tool 1.31 on Your PSP

To update, select , run the newly created "get_updater" file from your game list, and then return to ISO Tool to finalize with Game Update .

Allows users to decrypt EBOOT.BIN files and apply Prometheus or version patches, enabling older custom firmware versions to run newer game backups.

: Create and manage ISO and CSO (compressed ISO) files without needing a PC.

Let’s break down everything about , why it still matters in 2026, and how to use it properly.

If you want to optimize your original handheld console experience, please tell me: What are you currently using?

If you are a fan of the classic handheld scene, you know that the

If you still own a physical PSP, finding a large Memory Stick (64GB or 128GB via microSD adapters) is cheap. But why waste space? A raw PSP ISO can be 1.6GB. Using ISO Tool 131, you can compress that same game to a , shrinking it by 30-50% without noticeable load time differences.

The tool has its roots in an earlier application called ebt_exchange . As new PSP games with stricter firmware checks were released, the need for a simple, on-device patcher grew. ebt_exchange evolved into ISO Tool, which continued to be updated to support the latest games and patches.

Copy the iso_tool folder into PSP/GAME/ . The path should look like ms0:/PSP/GAME/iso_tool/EBOOT.PBP .

The PSP ISO document has several key features that distinguish it from other types of standards documents:

At this point, you can exit ISO Tool and try running the game. For many games, this is all that is needed.

Making it easier to patch and modify game ISOs (e.g., translation patches).