No. 15 of 29 ·Sega Genesis Emulators

Nostalgist.js

Web

Visit site Alternatives

Freedom report

Two barsScore 6.3

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely1 of 6 device platforms
DocumentedPlans, terms and facts published

Nostalgist.js is ranked #15 of 29 in Sega genesis emulators on Freedom251. 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: Yes
Supported platforms: web browsers
System scope: multi_console
Save states: Yes
Shader support: Yes
License: open_source

Best Nostalgist.js alternatives

See all 20

Two bars RetroArch Free tier No. 1Free6.8 Two bars BlastEm Free tier No. 2Free6.6 Two bars ClownMDEmu Free tier No. 3Free6.6 Two bars Lakka Free tier No. 4Free6.6 Two bars MAME Free tier No. 5Free6.6 Two bars ares Free tier No. 6Free6.5

The record

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

Where it ranks on Freedom251

Best Sega Genesis Emulators in 2026#15 of 29

Is Nostalgist.js yours?

Claim it for free: prove the domain, then correct facts, plans and screenshots. An editor reviews every change.

Claim it free Promote Nostalgist.js

Sources

nostalgist.js.org· checked 4 Oct 2026
nostalgist.js.org/apis/· checked 4 Oct 2026
nostalgist.js.org/guides/getting-started/· checked 4 Oct 2026
nostalgist.js.org/guides/under-the-hood/· checked 4 Oct 2026
github.com/arianrhodsandlot/nostalgist· checked 4 Oct 2026