jsc64

At a glance

• Editor score
  6.0 / 10
• Pricing
  Free plan
• Best for
  Browser demos with bundled programs
• Free plan
  Yes
• Paid from
  Free
• Supported platforms
  web browser (Firefox, Chrome, Safari)
• Facts checked
  21 Sep 2026

• Where it wins

  • Runs in Firefox, Chrome, and Safari
  • Loads PRG files with keyboard and joystick mapping
  • Embeds into web pages through jQuery integration

• Where it doesn't

  • Supports the Commodore 64 rather than multiple C64 variants
  • Requires a web browser and web-server deployment
  • Focused feature set compared with full desktop emulators

Our verdict on jsc64

jsc64 is an open-source Commodore 64 emulator written in JavaScript for modern web browsers. It is aimed at developers and enthusiasts who want to present C64 programs, games, or demonstrations in a web page without requiring a desktop emulator. The project uses HTML5 Canvas for screen rendering, supports Firefox, Chrome, and Safari, and includes bundled runnable C64 programs and games. Users can load PRG files, control the keyboard, map the numpad as a joystick, use the space bar as the fire button, and pause the demo interface.

Its strongest fit is browser-based presentation and lightweight web integration. jQuery plugin integration gives developers a defined way to place the emulator within web pages, while the browser delivery model keeps the experience tied to web platforms rather than desktop operating systems. The bundled library also provides ready-to-run content, which is useful for demonstrations and initial exploration. Deployment is described as uploading the package to a web server, so the main setup path is straightforward for someone already working with web pages and JavaScript.

The trade-off is a focused scope. jsc64 supports the Commodore 64 and centers on core emulation, PRG loading, input mapping, pause control, Canvas rendering, and bundled content. It is presented as a proof-of-concept port, making it a better choice for browser demos, embedded C64 experiences, and focused experimentation than for users seeking the broader tooling or platform coverage associated with full desktop emulators. Choose jsc64 when web delivery and simple integration matter most; choose an alternative when you need a wider emulator feature set or a non-browser platform.

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jsc64 pricing

jsc64 fact sheet

jsc64 integrations

jsc64 lists 1 integrations on its own site.

• jQuery

Alternatives to jsc64

• VICEFree, open-source C64 emulation with cycle accuracy, debugging, media support and network play.9.4
• BBreadbin466A free, open-source C64 emulator built for accurate hardware behavior and debugging.9.0
• C64 ForeverA Windows-focused C64 package with bundled titles, broad emulation, and preservation tools.8.8

See all jsc64 alternatives →

Featured on iTechGuides

jsc64 is listed in our Commodore 64 Emulators directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update