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Head-to-head · ZX Spectrum Emulators

JNEXT vs JSSpeccy 3

  • Updated Oct 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score JNEXT #2 in ZX Spectrum Emulators 9.3/10 Free plan Free plan✓ 2 of 2 features Visit JNEXT
JSSpeccy 3 #8 in ZX Spectrum Emulators 8.5/10 Free plan Free plan✓ 1 of 2 features Visit JSSpeccy 3

JNEXT leads on 0 checks, JSSpeccy 3 on 0, and 3 are even. Who comes out ahead on the 3 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreJNEXT · 9.3/10
  • Free planboth
  • Most featuresJNEXT · 2 of 2

JNEXT scores higher on our rubric for zx spectrum emulators: 9.3 against 8.5 out of 10; our editors rank them #2 and #8.

JNEXT is the better fit for next-focused emulation and debugging. JSSpeccy 3 is the better fit for instant browser-based emulation.

  • JNEXT fits best

    Next-focused emulation and debugging

  • JSSpeccy 3 fits best

    Instant browser-based emulation

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Side by side

Feature JNEXT 9.3/10 Visit ↗ JSSpeccy 3 8.5/10 Visit ↗
At a glance
Editor score 9.3 8.5
Ranking #2 in ZX Spectrum Emulators #8 in ZX Spectrum Emulators
Best for Next-focused emulation and debugging Instant browser-based emulation
Pricing model Free Free
Starting price Free plan Free plan
Free plan ✓ ✓
Free trial — —
Deployment Desktop Cloud
Platforms Windows, macOS, Linux Web
Built for Solo, Small business Solo, Small business
Features JNEXT 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 Linux, Windows, macOS web browser
Tape formats TAP, TZX, WAV TZX, TAP
Snapshot formats NEX, SNA, SZX, Z80 SZX, Z80, SNA
Peripheral support DivMMC, SD card, Multiface, DMA, UART, CTC, SPI, I²C, real-time clock, keyboard, USB gamepads, Kempston mouse, ESP-01 WiFi module Not checked yet
Our review
Pros
  • Supports ZX Spectrum 48K, 128K, +2A/+3, and Next machines
  • Built-in debugger includes CPU, memory, video, sprite, audio, and NextREG views
  • Loads broad program, tape, snapshot, and recording formats
  • 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
  • Focused on ZX Spectrum systems rather than broader computer platforms
  • Advanced debugging may be more than casual players need
  • Desktop support is limited to Windows, macOS, and Linux
  • 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

JNEXT is a free, open-source desktop emulator for ZX Spectrum 48K, 128K, +2A/+3, and ZX Spectrum Next software. It is aimed particularly at developers working with ZX Spectrum Next projects, while also supporting general software playback.…

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 →
  1. JNEXTZX Spectrum Emulators 9.3Free plan
  2. JSSpeccy 3ZX Spectrum Emulators 8.5Free plan

Strengths and trade-offs

  • JNEXT — where it wins

    • Supports ZX Spectrum 48K, 128K, +2A/+3, and Next machines
    • Built-in debugger includes CPU, memory, video, sprite, audio, and NextREG views
    • Loads broad program, tape, snapshot, and recording formats

    Where it doesn't

    • Focused on ZX Spectrum systems rather than broader computer platforms
    • Advanced debugging may be more than casual players need
    • Desktop support is limited to Windows, macOS, and Linux

  • 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

More comparisons

All ZX spectrum emulators comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update