KeyLab Desktop

The conformance bench,
installed on your machine.

The payShield 10K simulator, 51 cryptographic tools and a TCP client for the HSM on your bench — in one app that keeps working offline once you are signed in, because an offline test lab is a normal place to be.

All platforms

v1.39.0 · AppImage (.AppImage) · 175.4 MB

51cryptographic tools across 9 categories, validated against third-party oracles
1023tests passing — interoperability, not our own round-trip
:1500TCP to the payShield on your bench, one connection per command
offlineeverything keeps running with the wire unplugged once you are signed in

Download

Pick your platform

Windows

NSIS installer · .exe · 143.5 MB

Windows 10+ · 64-bit · 4 GB RAM · 500 MB disk

macOS

Universal DMG · .dmg · 243.6 MB

macOS 11+ · Apple Silicon & Intel · 4 GB RAM · 500 MB disk

detected

Linux

AppImage · .AppImage · 175.4 MB

Ubuntu 20.04+ · 64-bit · 4 GB RAM · 500 MB disk

What the desktop carries

Works offline

Once you are signed in, tools, simulator and the bench HSM client all run with the wire unplugged. Nothing phones home while you work.

TCP to the payShield on your bench

One connection per command — opened, used and closed — so a session never occupies one of the device’s limited host slots while you think.

Updates ask first

The app checks in the background, downloads only on your call, and installs on restart. No wizard reruns.

The same workspace as the web

Sign in with your free account to open the app — the same account keeps the browser and the desktop on one session, in sync.

Release history

Every release, stated plainly

v1.39.0

latestAug 20, 2026
  • Added
  • Evidence dossier (Pro, preview): render a run as a report — print to PDF or download as HTML.
  • The cover leads with the source tally; a run with no device lines is watermarked SIMULATED.
  • Desktop renders any run recorded on disk. Web renders the live session as a rehearsal.
macOS243.6 MBLinux175.4 MBWindows143.5 MB

v1.38.0

Aug 19, 2026
  • Added
  • The activity tape now saves to disk between sessions — your runs are on file when you reopen the app. Included with your account while in preview.
  • Console commands now appear on the tape alongside host commands.
  • Fixed
  • The tape no longer misses a command run while a long one was still printing.
macOS243.6 MBLinux175.4 MBWindows143.5 MB

v1.37.0

Aug 18, 2026
  • Added
  • The desktop now signs in — one free account, same session as the web. Keeps working offline for 30 days between sign-ins.
  • Changed
  • Plan names read the same on every screen.
  • Fixed
  • Boot no longer reports the network as unreachable while online.
  • Signing out everywhere now closes live sync connections too.
macOS243.6 MBLinux175.4 MBWindows143.4 MB

v1.36.10

Aug 18, 2026
  • Fixed
  • Command and tool counts shown in the app now match what is implemented: 37 host commands, 111 console commands, 51 tools.
  • References that named commands the simulator does not implement (FA, EI, VA) now name the real ones (KW, KQ, DC, DG).
macOS243.6 MBLinux175.4 MBWindows143.4 MB
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The simulator, the tools and your bench HSM — one app.

On all three platforms — sign in with your free account. The browser version stays where it is.