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Tech riderRev. 21 Sept 2026

PSeudo JS

Ch 126.2of 25 PlayStation Emulators
  1. 1Runs onWeb
  2. 2CostsNot stated by the maker
  3. 3License modelopen-source
  4. 4Supported platformsWeb
  5. 5BIOS requiredYes
4 lines stated Written from the maker's own pages: naden.co
Visit site Alternatives
The PSeudo JS homepage

Overview

PSeudo JS is ranked #12 of 25 in PlayStation emulators on Specifiction. It runs on Web.

Compared on PlayStation emulators

Supported platforms
Webnaden.co
BIOS required
Yesnaden.co
License model
open-sourcenaden.co

Facts

What it does
PSeudo JS is a PlayStation (PSX) emulator based on JavaScript.github.com · 4 Oct 2026
Codebase
It uses .h headers alongside .js files, inlines modular code for optimization before runtime, and is compatible with ES5 JavaScript onwards.github.com · 4 Oct 2026
Build requirement
Building PSeudo JS uses the Clang compiler and the repository instructs users to run the build command in a terminal.github.com · 4 Oct 2026
Run requirement
The project must run from a localhost server such as Apache, and testing requires a valid BIOS file in the bios folder.github.com · 4 Oct 2026
BIOS sourcing
The maker says it will not provide information on where to find a BIOS file.github.com · 4 Oct 2026
Game support
The emulator can load some commercial games.github.com · 4 Oct 2026
Performance limitation
The maker describes speed and overall experience as mediocre at best and timing as quite inaccurate.github.com · 4 Oct 2026
CPU implementation
The project uses a slow CPU interpreter, with an attempt to speed it up using a JavaScript tracer planned later.github.com · 4 Oct 2026
Progress
The repository lists CPU Mips R3000A at 95%, DMA at 90%, CD Decoder at 75%, Audio at 60%, and XA Audio at 10%.github.com · 4 Oct 2026
License
PSeudo JS is open source under the Apache 2.0 license.github.com · 4 Oct 2026
Browser technologies
The project repository tags it with WebAudio and WebGL.github.com · 4 Oct 2026

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Where it ranks on Specifiction

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Sources