To keep your credentials secure and out of your source control repository, set a system environment variable. IronPdf_LicenseKey Variable Value: IRONPDF-YOUR-LICENSE-KEY-HERE
| Error | Likely Cause | Fix | |-------|--------------|-----| | License key not found | Key never set | Set License.LicenseKey before any PDF operation | | This license is for evaluation only | Trial key in prod | Buy production key | | The license key does not allow deployment on this server | Wrong deployment type | Buy correct tier (Cloud, OEM, or Standard) | ironpdf license key
Applying an is required to unlock full functionality and remove evaluation watermarks when using the robust IronPDF library for C#, .NET, Python, or Java. Whether you are a developer looking to integrate HTML-to-PDF generation or a DevOps manager handling deployment, understanding how to securely obtain, apply, and manage your license key is essential. Understanding IronPDF Licensing To keep your credentials secure and out of
Then in code, you can load it:
string licenseKey = ConfigurationManager.AppSettings["IronPdf.LicenseKey"]; IronPdf.License.LicenseKey = licenseKey; Understanding IronPDF Licensing Then in code, you can