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gbajs3

Free#15 of 29 in Game Boy Advance Emulators

gbajs3: A free, open-source GBA emulator with browser, offline, and self-hosted options. Ranked #15 of 29 in Game Boy Advance Emulators by our editors (5.9/10); pricing: Free plan; best for web developers wanting an open-source GBA emulator.

5.9/10Editor score
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At a glance

  • Editor score
    5.9 / 10
  • Pricing
    Free plan
  • Best for
    Web developers wanting an open-source GBA emulator
  • Free plan
    Yes
  • Paid from
    None
  • Platform scope
    Desktop and mobile
  • Facts checked
    20 Sep 2026
gbajs3 screenshot

  • Where it wins

    • Supports both mGBA WebAssembly and gbajs JavaScript cores
    • Includes save states, cheat codes, remapping, and fast-forward
    • Works offline as a PWA and supports Docker-based local deployment

  • Where it doesn't

    • Runs in web browsers rather than as a native desktop application
    • Its ASM debugger is described as surface-level
    • Self-hosted deployments include administrative and API components

Our verdict on gbajs3

gbajs3 is a freely licensed Game Boy Advance emulator for modern web browsers. It is aimed at web developers and others who want an open-source emulator that works across desktop and mobile browser interfaces without plugins. The project supports two emulation cores: the mGBA WebAssembly core and the gbajs JavaScript core. Its free, open-source model makes it a practical fit for users who prefer an inspectable project without paid tiers.

The feature set covers the core emulator experience while adding useful browser-focused controls. Save states, cheat codes, remappable keyboard bindings, virtual desktop and mobile controls, and fast-forward are included. Offline progressive web app support extends access beyond an always-connected browser session. For development-oriented use, gbajs3 also includes a surface-level ASM debugger. These capabilities give it broader utility than a minimal browser emulator, particularly for users who value customization and debugging access.

Deployment is flexible, but the platform scope remains web-based. Users can run gbajs3 in a modern browser, install its offline PWA experience, or use Docker for local deployment. The project also includes administrative and API components for self-hosted setups, which may suit developers managing their own environment but adds scope beyond simply opening an emulator in a browser. Choose gbajs3 for open-source browser emulation, offline access, and configurable controls; choose an alternative if a native application or deeper debugging environment is the priority.

gbajs3 pricing

Plans Free planFree Free to use — no paid tier required for the core job.
See plans on github.com

gbajs3 fact sheet

Free planYes
Paid fromNone
Platform scopeDesktop and mobile
Save statesYes
Link multiplayerNot verified
Cheat supportYes
Graphics enhancementsNot verified
Open sourceYes
DeploymentCloud, Self-hosted
PlatformsWeb
SupportDocs
Built forSolo, Small business (editorial estimate)
PricingFree plan
Websitegithub.com
Facts checked20 Sep 2026

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Featured on iTechGuides

Featured on iTechGuides — gbajs3 5.9/10

gbajs3 is listed in our Game Boy Advance Emulators directory. Add the badge to your site — it links back to this page.

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Guides on game boy advance emulators

Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026

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