Gonitro.com/activation -

If you purchased a license for Nitro Pro 13 but downloaded Nitro Pro 14, the serial number will not work.

: If you've upgraded your OS or switched hardware, enter your serial number in the portal to "release" an old activation, allowing you to use it on your current machine.

If you need to (no internet on that machine): gonitro.com/activation

Here is a helpful, user-friendly article designed to walk users through the process.

Disclaimer: This article is for informational purposes. Ensure you keep your serial number safe and do not share it publicly to prevent software piracy. If you purchased a license for Nitro Pro

Ensure you are entering the number exactly as it appears. Check for confusion between the number 0 and the letter O . If you copy-pasted the code, ensure no extra spaces were added at the beginning or end.

: Click Activate to verify your license and unlock all features. Using the Nitro Activation Portal Disclaimer: This article is for informational purposes

: Click the Activate button. A window will appear asking for your license information.

: The portal currently supports serial numbers for Nitro Pro 13 and Nitro PDF Pro 14 . Users with older versions (v12 and below) may need to upgrade to ensure server compatibility. Common Activation Issues & Solutions