n64js
n64js: A browser-based N64 emulator with persistent saves but incomplete compatibility. Ranked #18 of 24 in Nintendo 64 Emulators by our editors (7.0/10); pricing: Free plan; best for browser users needing persistent save-device support.
At a glance
- Editor score7.0 / 10
- PricingFree plan
- Best forBrowser users needing persistent save-device support
- Free planYes
- Paid fromFree
- Facts checked20 Sep 2026
Where it wins
- Persistent save data through localStorage
- Supports Mempack, EEPROM, SRAM, and FlashRAM
- Configurable controls, fullscreen, and debugging interfaces
Where it doesn't
- Save states are not supported
- Graphical issues remain across some games
- Compatibility is incomplete
Our verdict on n64js
n64js is an open-source Nintendo 64 emulator written mostly in ES6 JavaScript. It runs in web browsers through a hosted GitHub Pages build and can also be built and served locally from its repository. The project is aimed at users who want to load Nintendo 64 ROMs in a browser without installing a traditional desktop emulator. It supports browser-based keyboard controller input, configurable controller bindings, high-level graphics emulation, and low-level audio emulation. Chrome, Firefox, and Safari are supported browsers, while Edge is untested.
Its strongest distinction is persistent save handling. n64js stores save data through localStorage and supports several Nintendo 64 save-device types: Mempack, EEPROM, SRAM, and FlashRAM. That makes it a practical fit for browser users who need progress to persist between sessions. The emulator also includes fullscreen and debugging interfaces, while WebGL is the listed renderer API. There is no paid tier to evaluate: the project is open source and has a free plan.
The trade-off is compatibility depth. The maintainers report that many games are playable, but graphical issues and incomplete compatibility remain. Save states are listed as a TODO, so users who depend on quick state snapshots will need another emulator. Choose n64js if browser access, open-source availability, configurable controls, and persistent save-device support matter most. Choose an alternative if you need broad compatibility, polished graphics across a wider range of games, or save states as a core part of the workflow.
Your product? Our editors can test n64js in depth and publish a review, labelled as paid · from $149/mo →
n64js pricing
n64js fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Supported platforms | Web browsers: Chrome, Firefox, Safari; Edge is untested |
| Online netplay | Not verified |
| Save states | No |
| Cheat support | Not verified |
| High-resolution rendering | Not verified |
| Controller remapping | Yes |
| Graphics renderer APIs | WebGL |
| Deployment | Cloud, Self-hosted |
| Platforms | Web |
| Built for | Solo (editorial estimate) |
| Pricing | Free plan |
| Website | github.com |
| Facts checked | 20 Sep 2026 |
Alternatives to n64js
- Mupen64Plus-NextA broad-platform N64 core with strong rendering, save, cheat, and input options.9.3
- Project64A focused Windows emulator with 64DD support, HD graphics, cheats, and debugging tools.9.1
- Mupen64PlusFree, configurable desktop emulation with plugins, saves, cheats, textures and controller support.8.9
Used n64js? Be the first to review it
The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used n64js for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.
Write a reviewTwo minutes · verified accounts only · read by an editor before it appears
Featured on iTechGuides
n64js is listed in our Nintendo 64 Emulators directory. Add the badge to your site — it links back to this page.
<a href="https://www.itechguides.com/products/n64js/"><img src="https://www.itechguides.com/best/badge/n64js.svg" alt="Featured on iTechGuides" width="230" height="46"></a>
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
Last updated · How we research and update