| Emulator | CHD Support | Performance in 2021 | Recommendation | | :--- | :--- | :--- | :--- | | | Full (Standalone) | Excellent | Best Choice | | RetroArch (Beetle PSX HW) | Full (via Libretro) | Excellent (Vulkan required) | Great for shaders | | PCSX-Rearmed | Full | Good (Arm/RPi optimized) | Best for handhelds | | ePSXe | None (v2.0.5) | N/A | Avoid for CHD | | Xebra | None | N/A | Archaic |
: Many enthusiasts share "curated sets" optimized specifically for handheld devices like the Miyoo Mini or Anbernic RG series.
Here is a comprehensive guide to understanding what CHD files are, why the 2021 shift matters, and how you can convert your own PSX games to optimize your emulation setup. What is the CHD Format?
Disclaimer: It is legal to make backups of games you own. Only download ROMs for games you possess. chd psx roms 2021
stands for Compressed Hunks of Data . It was originally created by the developers of the MAME (Multiple Arcade Machine Emulator) project to compress massive hard drive and CD-ROM images from arcade machines without losing any data.
: MiSTer FPGA (via the PSX core) and various ODEs (Optical Disc Emulators). How to Convert Your BIN/CUE Library to CHD
While CHD support existed prior to 2021, several factors converged during this year to make it the dominant format: | Emulator | CHD Support | Performance in
PlayStation 1 games were distributed on CD-ROMs, which hold up to 700MB of data. However, many games only filled a fraction of the disc, leaving the rest as empty dummy data or silent audio sectors. Traditional BIN/CUE dumps copy every single sector, meaning a 50MB game still takes up 700MB on your hard drive.
Throughout 2021, the CHD format cemented itself as the gold standard for storing PSX ROMs. It offers a perfect balance: substantial file size reduction without sacrificing emulator compatibility. In this guide, we will explore why you should use CHD PSX ROMs, how to convert them, and why this format was a game-changer for retro collectors in 2021. What are CHD PSX ROMs?
Download the latest version of MAME and extract chdman.exe from the folder. Disclaimer: It is legal to make backups of games you own
Virtually every modern emulator actively supports CHD files out of the box. You will have no trouble running them on: (PC, Android) RetroArch (Beetle PSX HW, SwanStation, PCSX ReARMED cores)
Instead of managing a .CUE file and multiple .BIN files for a single game, you have one tidy .CHD file.
The easiest way to get CHD files is to batch-convert your existing dump of .bin/.cue files using a tool called . For Windows Users
The Ultimate Guide to CHD PSX ROMs in 2021: Space-Saving and Lossless