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SPECIFICTION
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KuroganeNES vs WebNES

KuroganeNES

github.com

WebNES

github.com

Side by side

FigureKuroganeNESWebNES
Price fromFree—
Free planYes—
Free trial——
Open source——
WebYesYes
Plans published10
Spec score · NES Emulators7.7 (#11)6.5 (#24)
Compatibility limitThe v2.0 changelog says save states, TAS movies, and netplay sessions from version 1.x are not compatible with v2.0.Internet Explorer is explicitly unsupported because of performance issues and its lack of real typed arrays.
LicenseKuroganeNES is released under the MIT License, while bundled components retain their own licenses.The repository identifies its license as MIT.

Plans

KuroganeNES

  • KuroganeNESFree

KuroganeNES pricing →

WebNES

No plans published.

WebNES pricing →

In their own words

KuroganeNES

KuroganeNES is a free NES and Famicom Disk System emulator that runs from a self-contained HTML file in modern web browsers. Single-player setup involves opening nes.html and loading a ROM, with no installer, plugin, build step, or server. The project describes cycle-accurate emulation modeled on the NES-001 and verified against named test suites across four CPU/PPU clock alignments. It supports 561 mappers and uses CRC32 ROM fingerprints to choose mapper, mirroring, timing, and peripheral settings for thousands of known games. Video and audio include NTSC and PAL timing, composite-video modeling, and expansion audio for listed chips. Features include save states, rewind, fast-forward, local multiplayer, and online multiplayer for two or four players. Supported peripherals include the Zapper, Power Pad, keyboards, tablet, and microphone. Tools include cheats, ROM patching, an NSF player, TAS studio, and CPU/PPU debugging. Remote multiplayer needs Node.js, a TLS certificate, and port 8888 reachable by default.

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WebNES

WebNES has no write-up on Specifiction yet; its figures are above.

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