There are several websites and online communities dedicated to providing highly compressed PS1 ROMs. Some popular sources include:

If you tell me what you're using (e.g., DuckStation on PC, a specific handheld, or a mobile app), I can give you the exact steps to set up compressed files for your setup. CHD files - RetroPie Docs

: Standard PC emulators (DuckStation, RetroArch) and modern handhelds (Anbernic, Miyoo Mini). 2. The PBP Format (PlayStation Portable)

Create a text file in that folder, paste the following code into it, and save it as compress.bat :

Instead, the retro gaming community relies on specialized, "intelligent" compression formats that emulators can read on the fly. 1. CHD (Compressed Hunks of Data)

If you want, I can:

To get the smallest file sizes, you should look for or convert your games into these specific formats:

Myth 1: Compression lowers graphic quality or audio bitrates.

Insert your PS1 disc. Open ImgBurn. Click "Read image file from disc." Save the output as a .bin and .cue file.

Torrents and direct downloads of highly compressed sets reduce seed/leech ratios and hosting costs.

The reason CHD and PBP formats are so popular is their seamless compatibility with modern emulators. You can simply load the compressed file directly, just like an ISO. Top-tier emulators like and RetroArch (using cores like Beetle PSX or SwanStation) offer excellent native support for CHD files.

RetroArch provides granular control over emulation via “cores” like Beetle PSX HW (high accuracy) and SwanStation (performance-oriented). It supports CHD files and is ideal for users who enjoy deep customization or building an all-in-one retro gaming system.

Originally developed for MAME, CHD is now the gold standard for PS1 emulation. It uses LZMA and FLAC compression to shrink data and audio tracks losslessly. Unlike ZIP files, emulators like DuckStation or RetroArch can read CHD files directly without extracting them.

Excellent for mobile emulators, older hardware, and custom-firmware PSP/PS Vita consoles. 3. CSOS (Compressed ISO)