for free within the software to sign and encrypt documents. According to the Nitro User Guide , you can generate a self-signed digital ID by going to the tab, clicking My Digital IDs , and selecting 2. Legitimate Ways to Get Nitro Pro for Free

: Nitro Pro typically requires a one-time purchase or a subscription. Once purchased, you receive a serial number (not a "certificate") to activate the software.

Nitro Pro is an excellent PDF editor with a user-friendly interface and robust features. However, I deduct a point for the potential risks associated with using free activation certificates or serial keys.

If you're looking to use Nitro Pro, consider the following alternatives: