Downloads
Get CriticalPDF.
One signed MSI installs the virtual printer, the Windows service, and the desktop app. Run it as Administrator and you'll be capturing PDFs in minutes. The 30-day trial unlocks the full suite from the moment you install — no key required.
CriticalPDF Suite
Latest v2026.528.64.0Released 2026-05-28 · 187.1 MB · Windows 10 / 11 · Server 2016 – 2025 · 64-bit
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CriticalPDF UI
2.6.0.9
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CriticalPDF Service
2.9.1
CriticalPDF-Suite-2026.528.64.msi
SHA-256 · 44828C6E2C6200B9C434D4D03B59C82969CB8CD187FF185FD332AFBC7C5743D1
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.