Ironpdf License Key May 2026

How to Apply Your License Key

To use IronPDF in a live production environment without watermarks or restrictions, you must apply a valid license key.

• Lite License: For individual developers.
• Professional License: For teams (includes OEM redistribution).
• Unlimited License: For enterprise-wide use.

• Remove the Red Watermark: Without a license, IronPDF adds a red watermark to every generated PDF page.
• Remove Deployment Restrictions: The unlicensed version has a 30-day trial limit and is restricted to localhost only. A valid license enables production deployment.

Solution:

IronPDF binds evaluation keys to a specific machine fingerprint. If you change hardware (RAM, CPU, Disk) or clone a VM, the key breaks. Log into the Iron Software portal and "deactivate" the old machine to release the license lock, or purchase a key that supports floating licenses.

❌ Watermark still appears

Do Not Hardcode Keys in Source Control

Even with the correct key, developers often encounter issues. Here is how to fix the most common "IronPDF license key" errors.