Nitro PDF Pro 2021 v13.53 with Video installation Guide



Minimum System Requirements

Processor : Dual Core
RAM : 2 GB
Setup Size : 420 MB Approx.


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Nitro PDF Pro 2021 v13.53 Software, Inc. develops commercial software used to create, edit, sign, and secure Portable Document Format (PDF) files and digital documents. Nitro was founded in MelbourneAustralia by a team of three, as an alternative PDF software to Adobe Acrobat. In 2015, the company reported 1 million licenses sold. In 2018 it launch the Nitro Productivity and eSigning Suit. In October 2020, Nitro suffered a data breach; user and document databases (including from customers such as Fortune 500 companies) were stolen and offered for sale on the dark web. The company acknowledged the incident and said it was investigating it.


Products include a PDF editor, a browser-based application for electronic signatures and PDF productivity tools. Subscription services include a cloud-based user management and deployment tool, and analytics tools. Nitro also manages several free document conversion sites. The company sunset their PDF reader, Nitro Reader, in 2017, though users can get the same functionality with an expired free trial of Nitro Pro.

Nitro’s desktop products are Windows-only. Nitro Cloud is compatible with any web browser on any machine. Nitro Pro is proprietary trialware, while Nitro Reader is freeware for both personal and professional use.

Nitro version history

Version Date
Nitro Productivity Suite September 2019[6]
Nitro Productivity Suite (Nitro Pro 12 + Nitro Cloud) June 2018[7][8]
Nitro Pro 11 July 2016[9]
Nitro Pro 10 Oct 2014[10]
Nitro Pro 9 Sep 2013[11]
Nitro Pro 8 Sep 2012[12]
Nitro Pro 7 Nov 2011[13]
Nitro PDF Professional 6.2.1 Mar 2011[14]
Nitro PDF Professional 5.5.1 Apr 2009[15]

Nitro Reader version history

Nitro Reader 5
Nitro Reader Icon
Main screen of Nitro Reader.

Nitro Reader 5 in Microsoft Windows
Developer(s) Nitro Software, Inc.
Stable release[16] / 10 August 2016; 4 years ago[16]
Operating system Microsoft Windows
Available in English
Type PDF reader
License Freeware
Version Date
Nitro Reader 5 (sunset in 2017) March 2016[17]
Nitro Reader 3 October 2012[18]