CriticalPDF

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Download CriticalPDF

The MSI installs the whole suite: the virtual printer driver, the Windows service, and the desktop app. Run it as Administrator. The 30-day trial unlocks every feature at first launch without a licence key.

CriticalPDF Suite

Latest v2026.517.37.0 Cached

Released 2026-07-30 · Windows 10 / 11 · Server 2016 – 2025 · 64-bit

  • CriticalPDF UI

    2.3.0

  • CriticalPDF Service

    2.5.0.0

Download MSI

CriticalPDF-Suite-2026.517.37.msi

Installation guide → Release notes SHA-256 sidecar Need help choosing? Talk to sales.

System requirements

Operating system
Windows 10 (1809+), Windows 11, or Windows Server 2016 / 2019 / 2022 / 2025. All 64-bit. Server SKUs run in RDP / RDS multi-user environments.
CPU
x64 with SSE4.2 (any CPU from 2012 onward)
Memory
2 GB free RAM (4 GB recommended for high-volume capture)
Disk
~500 MB for the suite, plus space for captured PDFs and dead-letter queue
Network
Loopback-only management API on 127.0.0.1:9100 (configurable). Never reachable from the network. Outbound only to the destinations your templates send to.
Permissions
Local Administrator for install; service runs as LocalSystem
Dependencies
None. The MSI ships every runtime CriticalPDF needs.

Updates & previous releases

Once installed, CriticalPDF uses a manifest-driven auto-update system. The service checks for new builds on startup and every 24 hours, verifies each downloaded MSI's SHA-256 before applying, and installs silently in the background. A hash mismatch fails closed and the existing version keeps running. You normally don't need to download MSIs by hand again after the first install.

If you need a specific older build (for compatibility testing, staging, or to pin a fleet), contact support@criticalpdf.com with the version and we'll send you a signed copy.