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Head-to-head · Atari Emulators

Altirra vs Javatari

  • Updated Oct 2026
  • Both researched from official sources
  • 5 checks side by side
Higher score Altirra #2 in Atari Emulators 9.2/10 Free plan Free plan✓ 2 of 4 features Visit Altirra
Javatari #6 in Atari Emulators 8.6/10 Free plan Free plan✓ 3 of 4 features Visit Javatari

Altirra leads on 0 checks, Javatari on 0, and 5 are even. Who comes out ahead on the 5 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreAltirra · 9.2/10
  • Free planboth
  • Most featuresJavatari · 3 of 4

Altirra scores higher on our rubric for atari emulators: 9.2 against 8.6 out of 10; our editors rank them #2 and #6.

Altirra is the better fit for deep Atari computer emulation on Windows. Javatari is the better fit for accessible Atari 2600 multiplayer in a browser.

  • Altirra fits best

    Deep Atari computer emulation on Windows

  • Javatari fits best

    Accessible Atari 2600 multiplayer in a browser

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Side by side

Feature Altirra 9.2/10 Visit ↗ Javatari 8.6/10 Visit ↗
At a glance
Editor score 9.2 8.6
Ranking #2 in Atari Emulators #6 in Atari Emulators
Best for Deep Atari computer emulation on Windows Accessible Atari 2600 multiplayer in a browser
Pricing model Free Free
Starting price Free plan Free plan
Free plan ✓ ✓
Free trial — —
Deployment Desktop Cloud, Self-hosted, Desktop, Mobile
Platforms Windows Web, iOS, Android
Support Docs Docs
Built for Solo, Small business Solo, Small business
Features Altirra 2/4 · Javatari 3/4
Save states ✓ ✓
Netplay Not checked yet ✓ (best)
Controller remapping ✓ ✓
BIOS required — Not checked yet
Specs
Atari systems Atari 400/800, 1200XL, 600/800XL, 130XE, XEGS, 5200 Atari 2600
Supported platforms Windows web, iOS, Android
Our review
Pros
  • Cycle-exact emulation covers documented Atari hardware features.
  • Broad image, cartridge, expansion, disk, and controller support.
  • Debugger, save states, recording, and profiling support deeper work.
  • NetPlay supports multiplayer sessions across web and Android access.
  • Save states can be exported and shared.
  • Offline installation, touch controls, and a JavaScript API broaden access.
Cons
  • Available for Windows only.
  • Focused on Atari 8-bit computers and the 5200.
  • Real kernel ROM images may improve compatibility in some cases.
  • Emulation is limited to the Atari 2600 system.
  • NetPlay is not available on Apple iOS.
  • Advanced debug and playback controls may exceed basic emulator needs.
Our verdict

Altirra is a free, open-source emulator for Atari 8-bit computers and the Atari 5200, designed for Windows. It covers the Atari 400/800, 1200XL, 600/800XL, 130XE, XEGS, and 5200, making it a fit for users who want more than basic game…

Read the review →

Javatari is an open-source Atari 2600 emulator designed for modern web browsers, with support for iOS and Android devices. It suits players who want browser-based ROM loading, customizable controls, and multiplayer sessions without a paid…

Read the review →
  1. AltirraAtari Emulators 9.2Free plan
  2. JavatariAtari Emulators 8.6Free plan

Strengths and trade-offs

  • Altirra — where it wins

    • Cycle-exact emulation covers documented Atari hardware features.
    • Broad image, cartridge, expansion, disk, and controller support.
    • Debugger, save states, recording, and profiling support deeper work.

    Where it doesn't

    • Available for Windows only.
    • Focused on Atari 8-bit computers and the 5200.
    • Real kernel ROM images may improve compatibility in some cases.

  • Javatari — where it wins

    • NetPlay supports multiplayer sessions across web and Android access.
    • Save states can be exported and shared.
    • Offline installation, touch controls, and a JavaScript API broaden access.

    Where it doesn't

    • Emulation is limited to the Atari 2600 system.
    • NetPlay is not available on Apple iOS.
    • Advanced debug and playback controls may exceed basic emulator needs.
  • Altirra9.2/10 · Free plan

    A free, deep emulator for Atari software, hardware behavior, development, and debugging.

    Visit AltirraFull verdict →
  • Javatari8.6/10 · Free plan

    A free, open-source Atari 2600 emulator with browser access, NetPlay, and shareable save states.

    Visit JavatariFull verdict →

More comparisons

All atari emulators comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update