WebNES

On the record

Audio

Audio support uses the HTML5 WebAudio API.github.com · read 4 Oct 2026

Browser demo

The maker links to a playable release build hosted on GitHub Pages.github.com · read 4 Oct 2026

Browser limitation

The README says Internet Explorer is entirely unsupported because of performance issues and its lack of real typed arrays.github.com · read 4 Oct 2026

Build requirements

The project can run without building; building requires npm and Bower, and the README provides Windows and Linux build instructions.github.com · read 4 Oct 2026

Compatibility limit

Internet Explorer is explicitly unsupported because of performance issues and its lack of real typed arrays.github.com · read 4 Oct 2026

Controls

Keyboard keys can be remapped, and game pads are supported.github.com · read 4 Oct 2026

Controls and saves

Features include remappable keyboard keys, game pad support, and quick save and quick load save states.github.com · read 4 Oct 2026

Developer feature

The emulator can generate trace logs for CPU instructions and PPU events for ROM authors or other emulator authors.github.com · read 4 Oct 2026

Development tools

Trace logs for CPU instructions and PPU events are available for ROM authors and other emulator authors.github.com · read 4 Oct 2026

Game compatibility

It supports common NES mapper formats, and the README estimates that approximately 98% of games should work.github.com · read 4 Oct 2026

Game Genie

A database of Game Genie codes lets players activate or deactivate known codes for a loaded game.github.com · read 4 Oct 2026

Graphics

It supports WebGL with a canvas fallback and includes selected shaders such as CRT monitor emulation.github.com · read 4 Oct 2026

Graphics and audio

It supports WebGL with canvas fallback, selected shaders including CRT monitor emulation, and audio through the HTML5 WebAudio API.github.com · read 4 Oct 2026

License

The repository identifies its license as MIT.github.com · read 4 Oct 2026

Maker and audience

Pete Ward describes himself as a game development software engineer and calls WebNES his browser NES emulator written in JavaScript.github.com · read 4 Oct 2026

Maker background

Pete Ward’s GitHub profile describes him as a game development software engineer with over 20 years of coding experience.github.com · read 4 Oct 2026

Other player features

It supports screenshots, NTSC and PAL, ZIP ROM loading, variable game speed, and a Game Genie code database.github.com · read 4 Oct 2026

Product

WebNES is a JavaScript NES emulator built with HTML5 canvas and optimized for Chrome's V8 engine.github.com · read 4 Oct 2026

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