is a freeware Windows application designed to convert PlayStation Portable game images. The primary function of the software is to take a standard .ISO file (which is an exact 1:1 copy of a game disc) and compress it into a .CSO (Compressed ISO) or .DAX file.
Click the "Browse" or "..." button to select the PSP ISO file you want to compress.
Uncompressed PSP game dumps ( .ISO ) often contain significant amounts of dummy data or uncompressed audio and video files. This can cause a single game to take up to 1.6 GB of space. By compressing these files, you can achieve substantial benefits:
Open the extracted folder and run the executable file (usually PSP_ISO_Compressor.exe ). psp iso compressor v1 4 zip
The tool itself is downloaded as a ZIP file. Inside, there is usually an executable. Some users mistakenly try to run the ZIP file or think the tool is for unzipping archives. It is strictly for converting game ISOs.
If you have a PSP running Custom Firmware or you use the PPSSPP emulator on your phone,
Once finished, transfer the new .cso file directly into the ISO folder on your PSP's memory stick. Pros and Cons of Compressing PSP Games is a freeware Windows application designed to convert
If you get this error when launching the application, your Windows system is missing a legacy visual basic runtime file.
: Launch the program and choose the desired conversion, such as Compress ISO -> CSO Choose Files under "Input File" to select your PSP game ISO. Output File location where the new compressed file will be saved. : Choose a compression level. is the most common for maximum space savings, though
: Maximum compression (smallest file size) but may cause slight in-game lag or longer load times. Level 1–5 : Faster loading and less lag, but larger file size. : Click the Uncompressed PSP game dumps (
— I can help you verify its contents (typical filenames like PSP ISO Compressor.exe , a readme, etc.), tell you how to use it safely, or check if it’s likely a legit version of a known tool (e.g., Ciso or PSP ISO Compressor v1.4 by NJM ).
On the main interface, select your desired action from the radio buttons on the left panel (e.g., ).