zx_go vs JSSpeccy 3

ZGzx_go9.2Visit JSSpeccy 38.5Visit

Higher score ZG zx_go #3 in ZX Spectrum Emulators 9.2/10 Open source ✓ 2 of 2 features Visit zx_go

vs

JSSpeccy 3 #8 in ZX Spectrum Emulators 8.5/10 Free plan Free plan✓ 1 of 2 features Visit JSSpeccy 3

• zx_go fits best

  Advanced debugging across desktop platforms

• JSSpeccy 3 fits best

  Instant browser-based emulation

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Side by side

Feature	ZGzx_go 9.2/10 Visit ↗	JSSpeccy 3 8.5/10 Visit ↗
At a glance
Editor score	9.2	8.5
Ranking	#3 in ZX Spectrum Emulators	#8 in ZX Spectrum Emulators
Best for	Advanced debugging across desktop platforms	Instant browser-based emulation
Pricing model	Free	Free
Starting price	Open source	Free plan
Free plan	Not checked yet	✓ (best)
Free trial	—	—
Deployment	Desktop	Cloud
Platforms	Windows, macOS, Linux	Web
Built for	Solo, Small business	Solo, Small business
Features zx_go 2/2 · JSSpeccy 3 1/2
Built-in debugger	✓ (best)	Not checked yet
Open source	✓	✓
Specs
Supported Spectrum models	Not checked yet	Not checked yet
Host platforms	Windows, macOS, Linux	web browser
Tape formats	.tap, .tzx	TZX, TAP
Snapshot formats	.sna, .z80, .szx	SZX, Z80, SNA
Peripheral support	+3 FDC, Beta Disk, Opus Discovery, Interface 1/2, DISCiPLE, Multiface, Kempston mouse, ZX Printer, joysticks	Not checked yet
Our review
Pros	Emulates classic Spectrum models and ZX Spectrum Next Supports snapshots, tapes, disks, cartridges, and RZX recording Offers graphical, telnet, headless, and reverse debugging	Runs 48K, 128K, and Pentagon Spectrum machines in a browser Cycle-accurate scanline and multicolour effects with AY and beeper audio Loads snapshots, tape images, and supported files from ZIP archives
Cons	Spectrum Next emulation requires separately downloaded licensed ROMs Host platform coverage is limited to Windows, macOS, and Linux Its advanced debugging focus may exceed casual emulation needs	Web-browser access only; there is no desktop platform Spectrum +2 and +3 are outside its documented machine support Narrower peripheral and debugging coverage than desktop alternatives
Our verdict	zx_go is an open-source desktop emulator for classic Sinclair systems and ZX Spectrum Next. It covers the 48K, 128K, +2, +2A and +3 models, along with the Pentagon, Spectrum Next and SAM Coupé. The project is aimed at users who want more… Read the review →	JSSpeccy 3 is a browser-based ZX Spectrum emulator by Matt Westcott for people who want to run Spectrum software without a desktop installation. It emulates 48K, 128K, and Pentagon machines, handles documented and undocumented Z80… Read the review →

Strengths and trade-offs

• zx_go — where it wins

  • Emulates classic Spectrum models and ZX Spectrum Next
  • Supports snapshots, tapes, disks, cartridges, and RZX recording
  • Offers graphical, telnet, headless, and reverse debugging

  Where it doesn't

  • Spectrum Next emulation requires separately downloaded licensed ROMs
  • Host platform coverage is limited to Windows, macOS, and Linux
  • Its advanced debugging focus may exceed casual emulation needs

• JSSpeccy 3 — where it wins

  • Runs 48K, 128K, and Pentagon Spectrum machines in a browser
  • Cycle-accurate scanline and multicolour effects with AY and beeper audio
  • Loads snapshots, tape images, and supported files from ZIP archives

  Where it doesn't

  • Web-browser access only; there is no desktop platform
  • Spectrum +2 and +3 are outside its documented machine support
  • Narrower peripheral and debugging coverage than desktop alternatives

• ZGzx_go9.2/10 · Open source

  A deep desktop emulator for classic Spectrum systems, Next support, peripherals, and debugging.

  Visit zx_goFull verdict →
• JSSpeccy 38.5/10 · Free plan

  Free, open-source browser emulation with accurate timing and broad file support.

  Visit JSSpeccy 3Full verdict →