Ensure your PC has a modern multi-core processor (at least 4 cores/8 threads), a dedicated GPU supporting Vulkan, and at least 8GB of RAM.
Why is PS3 emulation so fast: RPCS3 optimizations explained [video]
If you want to explore the best ways to play these games on your current setup, let me know:
Currently, there is no "plug-and-play" website where you can upload a PS3 ISO and play it with full performance. While web technology has advanced rapidly, the PlayStation 3’s Cell Broadband Engine ps3 emulator on browser
These JavaScript APIs allow browsers to access your computer’s graphics card directly, enabling hardware-accelerated 3D graphics inside a webpage.
Here is everything you need to know about the current state of PS3 emulators on browsers, how the technology works, and the best alternatives available today. The Reality of PS3 Browser Emulation
For now, if you want the best PS3 experience, you should still download the desktop version of RPCS3. But if you want to witness the bleeding edge of web development and emulation colliding, booting up rpcs3.web in your browser is an absolutely mind-blowing experience that proves the death of the "console exclusive" is inching closer every day. Ensure your PC has a modern multi-core processor
While direct native emulation in a tab isn't viable, you can achieve a similar "click-and-play" experience using alternative methods. 1. Cloud Gaming (PlayStation Plus)
You create a free RPCN account directly through the emulator's configuration settings.
Why is PS3 emulation so fast: RPCS3 optimizations explained [video] Here is everything you need to know about
The PlayStation 3 is famously difficult to emulate. Unlike modern architectures, its Cell Broadband Engine architecture relies on one main PPU (Power Processing Unit) and seven active SPEs (Synergistic Processing Elements).
Some developers have attempted to port parts of the RPCS3 codebase to WebAssembly (WASM) . These are usually limited to running the PS3's XrossMediaBar (XMB) menu or very simple homebrew apps rather than full AAA games.