| Nitro PDF Pro | |
|---|---|
 The Nitro PDF Pro logo | |
| Developers | Nitro Software, Inc. |
| Stable release | |
| Operating system | Microsoft WindowsiOS |
| Available in | English |
| Type | Desktop publishing software |
| License | Trialware |
| Website | www |
Nitro PDF Pro is aPortable Document Format (PDF) editing application[2] and electronic signature software.[3]
Nitro Software was founded inMelbourne,Australia in 2005[4] to develop an alternative PDF software toAdobe Acrobat.[5]
In 2015, the company had sold 1 million licenses.[5]
In June 2021, the company acquired PDFPen, a PDF editing app for Mac, iPad, and iPhone.[6]
In May 2025, the company sent a letter to all owners of perpetual licenses older than version 13, informing them that their previously lifetime license will be deactivated unless they upgraded to a subscription model.[7]
As of June 2025, Nitro Software was graded F by the Better Business Bureau for the company's failure to respond to customer complaints.[8] As a result, Nitro Software is no longer rated by Better Business Bureau.[9]
