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Download KSeF Guard

FA(3) validator for Windows — install and start in 30 seconds.

Windows Installer (.msi)

v1.0.0 · Windows 10+ · ~30 MB

WebView2 installed automatically (already on Windows 10/11). Validation runs offline. License activation, payments, and updates may connect.

Download MSI Installer View release notes & verification

Portable ZIP (no admin)

Extract and run — no installation required. Ideal for accounting firms and shared workstations where MSI installation needs IT approval.

Extract the ZIP to any folder and run "KSeF Guard.exe". Data stays in the same folder.

Download Portable ZIP

Showcase XML Pack

9 FA(3) XML invoices — valid, warning, error, correction, and edge-case examples used in screenshots and product demos.

Testing/demo files only, not accounting templates.

Download XML Pack (.zip) SHA-256

Windows SmartScreen: The installer may show a "Windows protected your PC" dialog. Click "More info" then "Run anyway". We are in the process of obtaining a code signing certificate. You can verify the download integrity using the SHA-256 checksum published alongside the installer at ksefguard.pl/downloads/.

System Requirements

  • ✓ Windows 10 build 1809 or later
  • ✓ WebView2 (installed automatically; already on Windows 10/11)
  • ✓ ~50 MB disk space

Install in 3 Steps

  1. 1 Download the MSI installer
  2. 2 Run the installer (double-click)
  3. 3 Done — KSeF Guard is installed

CLI for CI/CD Pipelines

Standalone CLI binaries (no GUI) for automated validation in GitHub Actions, GitLab CI, and other pipelines. See documentation for integration guides. 

curl -fsSL -o ksef-guard.tar.gz \
  "https://www.ksefguard.pl/downloads/ksef-guard-linux-amd64.tar.gz"
tar -xzf ksef-guard.tar.gz && chmod +x ksef-guard
./ksef-guard validate ./invoices/

Linux Desktop App

Coming soon

Native Linux desktop app (GUI) is planned for a future release. The CLI binary for CI/CD is available above.