Suggestions appear as you type. Use the up and down arrows to choose one and Enter to open it.

This page's audience our own tag's counts — open to see them
–Visits
–Page views
–Clicks to vendors
–Time on page
–Reading now
Clicks to vendors, by tool
  • –
Top countries
  • –
Devices
  • –

– · visits, page views and clicks counted by our own tag, which counts more than our checked analytics; every figure rounded down · how we count

Head-to-head · ZX Spectrum Emulators

JNEXT vs GZX

  • 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
GZX #9 in ZX Spectrum Emulators 8.4/10 Free plan Free plan✓ 2 of 2 features Visit GZX

JNEXT leads on 0 checks, GZX 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

JNEXT scores higher on our rubric for zx spectrum emulators: 9.3 against 8.4 out of 10; our editors rank them #2 and #9.

JNEXT is the better fit for next-focused emulation and debugging. GZX is the better fit for simple free Windows or Linux emulation.

  • JNEXT fits best

    Next-focused emulation and debugging

  • GZX fits best

    Simple free Windows or Linux emulation

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.

Side by side

Feature JNEXT 9.3/10 Visit ↗ GZX 8.4/10 Visit ↗
At a glance
Editor score 9.3 8.4
Ranking #2 in ZX Spectrum Emulators #9 in ZX Spectrum Emulators
Best for Next-focused emulation and debugging Simple free Windows or Linux emulation
Pricing model Free Free
Starting price Free plan Free plan
Free plan ✓ ✓
Free trial — —
Deployment Desktop Desktop
Platforms Windows, macOS, Linux Windows, Linux
Support Docs, Community Community, Docs
Built for Solo, Small business Solo, Small business
Features JNEXT 2/2 · GZX 2/2
Built-in debugger ✓ ✓
Open source ✓ ✓
Specs
Supported Spectrum models Not checked yet Not checked yet
Host platforms Linux, Windows, macOS Windows, Linux, HelenOS
Tape formats TAP, TZX, WAV TZX, TAP, WAV
Snapshot formats NEX, SNA, SZX, Z80 Z80, SNA, AY
Peripheral support DivMMC, SD card, Multiface, DMA, UART, CTC, SPI, I²C, real-time clock, keyboard, USB gamepads, Kempston mouse, ESP-01 WiFi module Kempston joystick, MIDI port
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
  • Supports 48K, 128K, +2 and +2A Spectrum models
  • Handles TZX, TAP, WAV, Z80, SNA and AY formats
  • Includes AY audio, ULAplus, MIDI and a built-in debugger
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
  • Desktop support centers on Windows and Linux
  • Coverage is narrower than broader emulator alternatives
  • Peripheral support focuses on Kempston joystick and MIDI
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 →

GZX is an open-source ZX Spectrum emulator developed by Jiri Svoboda for people who want straightforward emulation on Windows or Linux. It covers the 48K, 128K, +2 and +2A Spectrum models, giving users a focused way to run software…

Read the review →
  1. JNEXTZX Spectrum Emulators 9.3Free plan
  2. GZXZX Spectrum Emulators 8.4Free 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

  • GZX — where it wins

    • Supports 48K, 128K, +2 and +2A Spectrum models
    • Handles TZX, TAP, WAV, Z80, SNA and AY formats
    • Includes AY audio, ULAplus, MIDI and a built-in debugger

    Where it doesn't

    • Desktop support centers on Windows and Linux
    • Coverage is narrower than broader emulator alternatives
    • Peripheral support focuses on Kempston joystick and MIDI
  • JNEXT9.3/10 · Free plan

    A free desktop emulator for ZX Spectrum software, peripherals, recording, and reverse debugging.

    Visit JNEXTFull verdict →
  • GZX8.4/10 · Free plan

    A free, focused emulator with useful tape, snapshot, audio and debugging support.

    Visit GZXFull verdict →

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