Upgrade to the latest version of Nitro's PDF and eSigning solution
The PDF & eSign solution designed for on-the-go professionals. Effortlessly edit, convert, secure, share & sign your essential documents on any device, wherever you are.  

This portal supports product upgrades for Nitro users who: 

  • Purchased Nitro PDF Pro for Windows prior to May 2023 on gonitro.com
  • Activated Nitro PDF Pro for Windows with an 18-digit serial number 
  • Use Nitro PDF for Windows version 13 or earlier
  • Have not upgraded to a Nitro Pro subscription

If you meet all of these requirements, please enter your serial number below to begin your upgrade.

If you don’t meet these criteria, please contact our support team for assistance.

Enter your Nitro PDF for Windows 18-digit serial number to begin the upgrade process:

Where’s my serial number?

Having trouble? Or if you don’t meet the upgrade criteria, please contact our support team for assistance.

FAQs

What happens to my version of Nitro PDF for Windows if I do not upgrade before the deactivation date?
After the deactivation date, Nitro PDF for Windows will cease to support all premium functionality, including editing, conversion, document protection, and digital signing. Nitro PDF for Windows can still be used for PDF viewing and will support basic PDF functionality such as printing and adding annotations and comments. Take advantage of the upgrade offer to ensure uninterrupted access to all premium features.
Why can I no longer purchase a one-time upgrade to Nitro PDF Pro v14?  
Nitro is transitioning to a subscription licensing model. As of November 2024, we no longer sell one-time Nitro PDF Pro upgrades. You may claim an exclusive subscription upgrade offer for our latest PDF and eSign solution at a significantly discounted price of USD $50/year for three years, applicable for up to 20 licenses. (Price may differ by region.)
I received a notification that some of my licenses will be deactivated. What about my other licenses? 
Nitro is transitioning to a subscription licensing model. All Nitro PDF Pro for Windows perpetual licenses will be deactivated by December 31, 2025. You will receive an email notification prior to deactivation. You can upgrade up to 20 perpetual licenses to a subscription now, regardless of the deactivation date.
I have multiple licenses that will be deactivated at different times. How can I purchase additional licenses with this upgrade offer?
This Nitro Pro upgrade offer is applicable for up to 20 deactivated licenses. If you have more than 20 licenses to update, please contact our support team for assistance.

If this is your first upgrade to Nitro Pro, please enter a serial number provided in your email above to begin the upgrade process, where you can purchase up to 20 licenses. You do not need to wait for all of your legacy licenses to expire to replace them with this offer.  

If you have already claimed this upgrade offer to Nitro Pro, just login to your Nitro account, select the number of additional licenses to lock into this price, and complete your purchase.

Alternatively, you may use a different serial number provided in your email above to continue your upgrade process. You will be prompted to login to your Nitro account to complete your purchase.
I received notification that a Nitro representative will be in touch with more details about my deactivated licenses. When can I expect to hear from them?  
A Nitro representative will be in touch within 7 days of receiving your deactivation notification. If you don’t hear from a Nitro representative within 7 days, please contact Sales.
Where can I learn more about Nitro Pro?
You can explore the features and benefits of Nitro Pro here. 
What is included with Nitro Pro?
  • The latest version of Nitro PDF Pro for Windows: Continuous updates are included with your subscription, along with new features, enhanced tools, accessibility improvements, increased language options, faster OCR scanning, improved conversion from PDF to MS Office formats, all the latest security updates and more. 
  • Choose between Windows, Mac, and iOS versions of Nitro PDF Pro: Enjoy more flexibility to work on the go across your devices.  
  • Access to Nitro Sign: Send documents for unlimited eSignatures by multiple parties, in addition to your QuickSign tool within PDFs. 
  • New web and AI tools: Get the latest Nitro innovation as it happens including new web-based PDF tools and AI tools designed to accelerate everyday tasks. 
  • Easy activation: Activate using your email and a password, no more serial numbers required! 
What serial number should I use to claim my upgrade?
Use the 18-digit serial number provided in the email sent to you. If multiple serial numbers are provided, enter only one to claim your upgrade offer.
Why can’t I claim my exclusive Nitro Pro subscription upgrade offer?
This offer is only available to customers with Nitro PDF Windows for versions earlier than v14 and who have not previously purchased a Nitro Pro subscription plan.  

The offer can only be claimed one time per deactivated serial number. If you have already used a serial number to claim an offer, try a different serial number or login to your Nitro account where you can purchase additional licenses at the same offer price for up to 20 deactivated licenses. 

If you still can’t claim your exclusive Nitro Pro offer, please contact our support team for assistance.