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Tech riderRev. 4 Oct 2026

Nostalgist.js

Ch 196.7of 29 Sega Genesis Emulators
  1. 1Runs onWeb
  2. 2CostsFree plan
  3. 3Licenseopen source
  4. 4Supported platformsweb browsers
  5. 5System scopemulti console
  6. 6Save statesYes
  7. 7Shader supportYes
7 lines stated Written from the maker's own pages: nostalgist.js.org, github.com
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The Nostalgist.js homepage

Overview

Nostalgist.js is ranked #19 of 29 in Sega genesis emulators on Specifiction. It runs on Web. There is a free plan.

Nostalgist.js plans and pricing

All plans
Nostalgist.js Free MIT-licensed JavaScript library; no paid plans are stated github.com · 4 Oct 2026

Compared on Sega genesis emulators

Free plan
Yesnostalgist.js.org
Supported platforms
web browsersnostalgist.js.org
System scope
multi_consolenostalgist.js.org
Save states
Yesnostalgist.js.org
Shader support
Yesnostalgist.js.org
License
open_sourcenostalgist.js.org

Facts

What it does
Nostalgist.js is a JavaScript library for running retro console emulators such as NES and Sega Genesis in web browsers.nostalgist.js.org · 4 Oct 2026
Intended audience
The project describes itself as a tool for developers who want to build browser based emulation experiences.nostalgist.js.org · 4 Oct 2026
Emulation engine
It simplifies launching RetroArch in a browser using a ROM and a core, without additional configuration.nostalgist.js.org · 4 Oct 2026
Save and load
The library can save a game's state and load it later.nostalgist.js.org · 4 Oct 2026
Configuration
Developers can customize RetroArch and core configuration before launch.nostalgist.js.org · 4 Oct 2026
Low level access
The API exposes low level Emscripten interfaces, including the virtual filesystem.nostalgist.js.org · 4 Oct 2026
Console helpers
The API documents helpers for NES, SNES, Mega Drive, Game Boy, Game Boy Color, and Game Boy Advance.nostalgist.js.org · 4 Oct 2026
Distribution
Projects can install the library through npm, yarn, pnpm, or bun, or load it from CDNs including unpkg and jsDelivr.nostalgist.js.org · 4 Oct 2026
Dependencies and delivery
Nostalgist.js itself does not contain emulators; by default, emulator cores are fetched from RetroArch Emscripten builds via jsDelivr.nostalgist.js.org · 4 Oct 2026
Bring your own content
Developers can load ROM files from their own server, which must have CORS headers configured properly.nostalgist.js.org · 4 Oct 2026
Content limitation
The project says it does not provide or encourage pirated ROM or BIOS files.nostalgist.js.org · 4 Oct 2026
Examples and integrations
The project documents a StackBlitz example and lists projects including NextCloud Nostalgist and a VS Code extension among its showcases.nostalgist.js.org · 4 Oct 2026

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Where it ranks on Specifiction

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Sources