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Everything you need to know about Nitro Products - from product updates and downloads, to user guides and release notes.

Product Updates

Nitro regularly releases updated products with new features, enhancements, and bug fixes. Minor updates (from version 11.1 to 11.2, for example) are available free of charge for users with a valid license.

Nitro Pro 12

Latest Version:
Release date:  June 12th, 2018
Release Notes »

Download Nitro Pro 12

Nitro Pro 11

Latest Version:
Release date:  January 30, 2018
Release Notes »

Release Notes

Nitro regularly releases updated products with new features, enhancements, and bug fixes. Minor updates are available free of charge for users with a valid Nitro VIP Access or Product Updates subscription.

Latest Version:

Features & Enhancements:

Digital Signature Enhancements

  • Nitro Pro has optimized the process of digital signature validation, resulting in faster and more efficient digital signature workflows.
  • Nitro Pro has expanded signature validity for documents with complex permissions. Nitro users are able to set a broader range of security permissions, allowing password-protected documents to be signed.
  • We have improved our digital signature user experience, so notifications regarding document validity or modification are clearer and easier to see. Nitro Pro will notify users of the document's integrity status not only in signature properties, but also in the left signature panel, making it improbable to miss important document integrity statuses.
  • In Nitro Pro, every digitally signed document will be protected from tampering or fraudulent changes to the content. Whiteout and Redaction tools are disabled, making it impossible to hide content on a digitally signed or certified document, so users can have peace of mind knowing their documents are secure.
  • Nitro Pro now supports document versioning and revisions when it comes to digital signatures. If the signature of a digitally signed document is invalidated, Nitro Pro will allow the user to view the original, signed document as it was before any of the changes that caused signature's invalidation were made. Users can restore and compare document versions, allowing the changes to be tracked.
  • Nitro Pro has expanded document security features, now enabling a document to be fully locked after digitally signing. This update will prevent any attempts to tamper with the document. In addition, any content editing--including adding annotations–will be prohibited.
  • Nitro Pro had an issue that cause the Certificate Profiles dialog to be opened instead of Signature Profiles, when a new digital signature was being added to a previously cleared signature form field. This issue has been resolved. Nitro Pro will display correct dialogs when adding a digital signature or digital certificate.\Nitro Pro has improved left-side panel actions when working with digital signatures. To make digital signing workflows faster, users will be able to mark for redaction, add comments, and save redaction markings, all from a thumbnail view on digitally signed documents.
  • Behavior of Multiple Instances feature has been improved when dragging and dropping digitally signed documents. Nitro Pro will show an error when combining (by drag and drop) two documents with identical signature fields. Nitro Pro will notify a users that identical digital signature form fields will be merged into one.
  • We have improved the User Experience of the left-side 'thumbnails' panel and enabled more features. Users will now be able to mark pages or page ranges for redaction on a digitally signed document not only from the main menu, but also in the left-side panel.
  • Nitro Pro has improved messaging when combining documents or inserting pages, so that any errors can be prevented. When combining two or more documents which include digital signature form fields, any identical digital signature form fields will be merged into one. Nitro Pro will display a message providing this information.
  • Nitro Pro has refined security features for digitally signed or certified documents. The Whiteout tool is now disabled for all certified documents to ensure no content changes are allowed and documents are secure.
  • Inserting new pages of from the left-side panel into a digitally signed or certified document is now disabled to ensure digitally signed documents are secure and cannot be modified.
  • Nitro Pro has improved functionality when combining documents and inserting pages with digital signatures. In such documents, digital signature fields will be cleared and identical fields merged. This will ensure that signed documents cannot be modified in any way.
  • Nitro Pro has improved Page Layout functionality. Inserting pages into password-protected documents is now enabled, provided the user has the correct password for the document.
  • Nitro Pro had an issue when renaming digital signature form fields with a preexisting name. This issue has been resolved - users will get an error notification to choose a different name.
  • Nitro Pro has improved digital signature workflows, including an ability to certify documents with linked text and signature form fields. In prior versions, certification was shown as invalid when a document consistent of linked text and signature form fields. This issue has been resolved and works as expected.
  • When clearing one's own digital signature from a document, a user can now add a new digital signature field in the same signature form field, so that users can speed up digital signature workflows.
  • When combining digitally signed documents, Nitro Pro will correctly combine all form fields, including digitally signed fields, and digital signature fields will be cleared to prevent any fraudulent changes.
  • Nitro Pro has improved workflows for documents with digital signatures. Users can now easily combine digitally signed documents for improved productivity.
  • Nitro Pro users can perform complex tasks related to digital signatures, such as easily protecting selective form fields with other digital signature fields. This will enable only authorized persons to access certain form fields for filling or signing.

UX Improvements

  • Nitro Po has improved functionality when working with keyboard shortcuts. Users are able to modify and save keyboard shortcuts for various actions in Nitro Pro to make workflows even more efficient.
  • A new, re-vamped search panel makes Nitro Pro even more user-friendly. Styling has been improved for better structuring and faster viewing, while some functions, such as common keyboard shortcuts, will enable users to search for and find information faster.
  • Send documents for signature via Nitro Cloud faster than ever before. Users can now request electronic signatures with a single click straight from the Home Ribbon.
  • Nitro Pro has a new, re-vamped, modern product tour, which highlights main features to give a quick head start for first time users.
  • Re-sizing a QuickSign™ signature has become much more convenient. Nitro Pro now enables users to quickly re-size a QuickSign™ signature any time before the document is saved.

Printing Improvements

  • A number of improvements were made in relation to both printing to PDF or a physical printer.
    • Users can now see an accurate preview when printing multiple pages per sheet.
    • Ability to choose printing properties, such as selecting specific pages for printing from the left hand-side panel.

Conversion Improvements

  • Nitro Pro has made significant improvements and enhancements in the quality of document conversion from PDF to both MS PowerPoint and Excel. This will enable users to quickly and easily convert documents for further editing with precise detail. We have improved conversion algorithm, resulting in more accurate and robust outcomes after conversion, when converting from PDF to MS PowerPoint or Excel:
    • All content will be converted, including text, images and special symbols.
    • Visible layout improvements after conversion, such as enhanced row and column detection will result in better document accuracy
    • Font substitution has been improved resulting Nitro Pro to recognize fonts which will be identical or very close to the original
    • Styling, such as font size and colors, cell size and colors, and table characteristics has also been improved

Other Improvements and Enhancements

  • Nitro Pro has improved some workflows when using virtualized App V environment. Conversion of supported files to PDF using various methods, such as "drag and drop" and "from file," amongst others, have become more reliable.
  • Saving documents which contained fillable form data to WorkSite is no longer an issue. User will be able to retain any fillable data and save to a chosen location.
  • A number of other enhancements have been added to Nitro Pro resulting in better quality and stability.

Known Issues:

Digital Signatures

  • 'Repeat Mark Across Pages' button in 'Erase' ribbon is disabled for signed documents that are not fully locked.
    Workaround: Repeat markups manually by drawing a redaction rectangle on the pages as needed.
  • 'Summarize Comments' and 'Summarize Comments and Print' under 'Review' tab are disabled for documents that are digitally signed or certified.
  • When a document has been created and signed with full lock in Acrobat, clearing the signature and re-signing in Nitro Pro will result in an error.
  • Saving a digitally signed or certified document to a DMS location which is configured via OmTools will invalidate the signature.
    Workaround: Use native SharePoint or Worksite connection.
  • When a document has been certified, the certification cleared, and the same form field re-used for a digital signature, it will result in the document becoming editable.
  • The markup context menu does not appear on a digitally signed document.
    Workaround: Use keyboard shortcuts or contextual Ribbon menu to perform actions on markups.
  • User is able to add an attachment via attachment panel on digitally signed documents.
  • Nitro Pro has an issue when opening large certified documents and will sometimes result in application freeze. This occurs on very large documents over 200MB.

Cloud/DMS integrations

  • Nitro Pro has an issue when checking documents out/in to WorkSite connection.
  • In WorkSite deployment, Nitro crashes after a file opened from native cloud storage applications is saved to WorkSite via the 'New Document' option.
  • When user's machine is not connected to the Internet, Nitro Pro will not display an error message when sharing a document via Nitro Cloud.
  • Cloud storage files cannot be shared to Nitro Cloud and results in an error.
    Workaround: Connect storage providers directly to Nitro Cloud we app.


  • Nitro Pro does not fully support dynamic XFA documents. When editing a an XFA document and attempting to save, Nitro Pro will not save the document.
  • Nitro Pro’s MS Office add-ons will not be installed on machines, where MS Office was previously installed from Microsoft marketplace. This known issue will be addressed in a future release.

SharePoint 2013/2016

  • When user modifies a checked out document in Nitro Pro, and attempts to close it without saving any changes, Nitro Pro will display a check in dialog.
  • When saving a checked out document to a local location, the saved document will not be opened from recent documents.
    Workaround: Navigate to the file in Windows Explorer and open.
  • Nitro Pro will suggest user to select a minor or major version when saving a checked out document, despite "Create Major versions" setting was applied in SharePoint settings.
  • When performing a "Save As" operation, "Enter" keyboard shortcut does not work. Users should use their mouse to save the document.
  • When user attempts to save a modified, but not checked out document, Nitro Pro will open "Checkin options" dialog, instead of "Save As".
    Workaround: Click File- Save As and save the document to a desired location.
  • User is not able to disconnect from SharePoint via Nitro Pro.

Previous Versions


Resolved Issues

  • Windows 10 Fall Creators Update issue. Last quarter, Microsoft released its latest Windows 10 Fall Creators Update to users. Unfortunately, this update created slowness and performance issues with many applications, including Nitro Pro.

    Nitro Pro 11.0.7 update release fixes the performance issue. Nitro Pro is now working as expected.

  • Nitro Pro had an issue with ‘Redaction’ tool. After applying redaction to certain documents in Nitro Pro, the content behind redaction boxes was not removed. Redaction boxes could be removed with Edit tool, or by copy-paste, resulting in content underneath becoming visible. This issue has been resolved with this update, Redaction tool works as expected.


Features & Enhancements

This release of Nitro Pro delivers a lot of new enhancements and features based on direct feedback from our customers.

  • Digital Signature Features and Enhancements

    Improvements to Nitro Pro’s digital signature features enable users to sign and certify documents faster and more securely, without the waste of time and resources associated with printing. By introducing more complex signature permissions, document locking, and expanded support for modern digital signature methods such as DocuSign, users can leverage Nitro Pro to execute more stringent digital signature workflows, eliminating the need for additional eSignature software.

    • When a document containing digital signature or certificate is opened, Nitro Pro will now display a notification so that users can quickly check validity of digital signature or certificate.
    • Nitro Pro is now able to clear a digital signature on a document. Nitro Pro previously had an issue where after clearing a digital signature its appearance was still visible. This issue is now rectified.
    • Nitro Pro now supports locked form fields on digital signatures. A user is able to lock all or select fields after signing a document.
    • Nitro Pro had an issue where document restrictions did not refresh after clearing a digital signature or certificate. Closing and reopening a document after clearing a signature or certificate now shows correct permissions.
    • Nitro Pro has an improved signature selection feature making it quick and easy to apply digital signatures on a document.
    • Nitro Pro now supports all modern digital signature methods, including full support for recognizing DocuSign digital signatures.
    • Nitro Pro now supports document locking after signing.
    • Users are now able to clear their own signatures on a document.
    • Nitro Pro now supports more complex digital signature sections of PDF specification, allowing more complex signature permissions.
    • Existing signature profiles are now shown when users signing documents as Preparers or Reviewers.
    • Nitro Pro now allows multiple digital signatures on a document.
  • Print Scaling Settings Enhancements. Nitro Pro now retains print scaling settings in the print dialog, making print workflows faster.
  • Improved Text Formatting when copying from PDF. Nitro Pro has a new feature which allows users to copy text with formatting. When text is selected, on right-click, users now have a choice to copy text with or without formatting. A keyboard shortcut (Ctrl + Alt + C) has also been added to copy text with formatting to speed up users’ workflows.
  • Print issues when printing with some PLC printer drivers have been resolved. Nitro Pro had issues printing PDF to Xerox PLC Pull Print driver. Xerox PS Pull printer driver, or any other printer drivers are unaffected.
  • Worksite Document Management System Integration Enhancements
    • Issue when saving a document after redactions have been applied is now resolved.
    • Fillable form data is now being retained when saving a document to Worksite.
    • Issue allowing one document being open in two instances is now resolved.
  • New Online User Guide. In-product User Guide now points to online location so that users can quickly find the most up to date documentation and helpful hints. See User guide here:
  • An issue with opening a document after applying redactions was resolved. Nitro Pro wasn’t able to open original document after redactions have been applied.
  • An issue when opening a file where full path exceeded 259 characters causing Nitro Pro to crash is now resolved.
  • Security Vulnerabilities Addressed. For more info see



Resolved Issues & Enhancements

  • Print Reduction Enhancements. Nitro Pro has updated the print dialog with a new design to help reduce printing. Before users print, they are encouraged to use alternative features in Nitro.
  • Multi Window Management. Fixes and enhancements to multi-window management.
  • Improved text formatting from PDF to Excel. Nitro Pro has improved formatting, when copying and pasting content from PDF to Excel.
  • User Experience Enhancements
    • Nitro Pro now displays a number of pages, when combining documents
    • Quick-sign signature can be placed without selecting ‘Apply’
    • Nitro Pro now has a default view option in Internet Explorer
    • Nitro Pro now maintains printer preferences across print jobs
    • Flickering cursor issue has been addressed
  • Network Issues Addressed. Issue resolved with opening documents from DFS network drives.
  • Worksite Improvements
    • Issue resolved when saving a file as a “New Document”- the original file became disconnected from Worksite server.
    • Users can now save files opened from Outlook directly to Worksite.
  • A number of other fixes and enhancements
  • Security Vulnerabilities Addressed. See

Known Issues

  • Issues with Document Tagging. When using Nitro Pro, users are unable to add document tags. Document tagging enables screen reading programs to interpret text correctly even after it has been re-ordered. An option ‘Enable Accessibility and Reflow with tagged PDF’ does not work, when printing a document to PDF. Nitro Pro is able to read documents created in other applications with tagged content.
  • Issue with Save- As after redacting. After applying redactions and saving to a new document, Nitro Pro is not able to open the original document. When user attempts to open original document in Nitro Pro, it will fail to open and will not display an error message.
  • Workaround: Close and re-open Nitro Pro to be able to open the original file.

  • Auto - rotate and center pages option in Page Scaling settings under print menu does not work as expected. The printed document will not be rotated.
  • Workaround: Select ‘Use PDF page size to select paper source’ in Page Scaling settings. This will automatically rotate and center pages.



Resolved Issues

  • CAD Support
    • Nitro Pro now supports high quality rendering of Computer Aided Design (CAD) drawings in PDF
    • Users of popular CAD software, such as Revit, AutoCAD and Microstation (among others) can now export their drawings to PDF format
    • Confidential or sensitive CAD drawings can now be converted to PDF and secured with Nitro Pro’s integration with Microsoft Rights Management Services (RMS)
  • Conversion Quality & Visual Fidelity Improvements
    • Nitro Pro has vastly improved the quality when converting documents to PDF from a variety of formats and applications, including Word, Excel, PowerPoint, and Outlook
    • Introduction of PostScript-based document conversion to optimize PDF output quality
    • Conversion to PDF now supports much greater detail; more accurate, vibrant colours and sharper lines
  • Enhanced Multi-Window Management
    • Nitro Pro now allows you to drag out a document from one window to create another instance of Nitro Pro – similar to ripping out tabs in popular internet browsers
    • Individual pages can be dragged from one document and inserted into another document in a different instance of Nitro Pro
    • A large number of Nitro Pro instances can be created to view and edit PDF documents
  • Conversion Speed Performance improvements
    • Major improvements in file conversion performance from Word to PDF and PowerPoint to PDF
  • Worksite Integration Improvements
    • Nitro Pro offers integration with the WorkSite Document Management System. Additional WorkSite functionality has been added to Nitro Pro:
      • Opening a local document and saving it to WorkSite
      • New Save and Save-As options (Replace Original, New Version, New Document)
      • Open File dialog – showing WorkSite options
      • Error reporting significantly improved
  • Dropbox API was updated to V2.
    • Dropbox has shut down API V1 as of June 28th, 2017. Nitro Pro now uses Dropbox API V2. Customers who use Nitro Pro to access their Dropbox account will need to update to Nitro Pro 11.0.5.
  • Security Vulnerability Addressed

Numerous product enhancements and bug fixes have been included in Nitro Pro 11.0.5 to improve usability and application performance

Known Issues

  • Embedding fonts issue. Embed Subset is now the default option. This can cause a slight increase to file size. Characters that are used in PDF document will be embedded.
  • Document Tagging for PDF/A documents. If a PDF/A document with tagging is created in Nitro Pro, sometimes document content is missing. Nitro Pro is able to read PDF/A documents created in other applications. PDF/A documents without tagging, which were created in Nitro Pro work as expected.
  • Workaround: Create standard PDF documents or PDF/A documents without tagging.

  • PDFA-1b documents appear without links, bookmarks or PDF view options, when generated using Nitro Pro printer driver.
  • Workaround: Create standard PDF documents with Nitro Pro printer driver, navigate to Convert tab in Nitro Pro and select Convert to PDF/A- 1b.

  • Multiple PDF drivers appear in Devices and Printers. When upgrading Nitro Pro to a newer version, sometimes the previous Nitro PDF printer driver is not removed.
  • Workaround: Uninstall previous version of Nitro Pro before installing a new one. Also, printer driver can be deleted manually from Devices and Printers in your Control Panel.

  • Imperial system conversion is incorrect in Custom Forms in Printer Preferences. When adding a custom form, width and height does not correspond to the display.
  • Workaround: This issue does not occur when using metric system. To switch to metric system, go to Control Panel, Clock, Language and Region, select Change date, time, or number formats, click on Additional settings, switch to metric system and click Apply.

  • When printing from Revit 2017 to Nitro Pro PDF printer driver, sometimes conversion does not complete. Revit 2018 works as expected.
  • Workaround: Use auto- generate filename in printer settings or use the latest version of Revit.

  • Drag and drop of Worksite and Cloud storage documents between Nitro Pro windows is not supported.
  • Workaround: Close the document in the window you wish to drag from and then open it in the target window.

  • For Worksite documents when using File- Save and selecting “New Document” option, the save to the new document will occur. The original document, however, will become disconnected from Worksite server. The original document may no longer be updated to Worksite without being first re-opened.
  • Workaround: Close the original document and reopen it through Worksite.

  • The OmTool plugin does not support multiple instances. If you need to use Worksite and/or Sharepoint, use native integration instead.
  • Issue with Bates Numbers. When saving a document as a new file after applying Bates settings, Nitro Pro is unable to open the new document.
  • Workaround: Close original file and add Bates Numbering to a new file or close and re-open Nitro Pro to be able to open the original file.

  • Bookmarks do not work as expected in multi-column document. Bookmark processing occurs top to bottom of the document making the order in the bookmarks hierarchy inaccurate. This only affects multi-column documents.
  • Workaround: Open Bookmarks Pane, click and drag a bookmark to re-arrange it into it’s correct position.

  • Unable to open a PDF document from redirected network locations, e.g. DFS. Nitro Pro is launched, but the document is not opened.
  • When opening a file where full path exceeds 259 characters- Nitro Pro will crash.
  • When saving a file as a new document, after applying redactions, an error will occur.
  • Workaround: Close and re-open Nitro Pro to be able to open the original file. To Apply redactions, save the file locally prior to redacting it.

  • When saving a PDF file from Nitro Pro to a new version of a Worksite document that is not a PDF type, it will retain the same document type.
  • Workaround: Change the document type to Acrobat prior to saving it as a new version.

  • When filling a form opened from Worksite, and saving it as a new document from Worksite options, the data filled is not retained.
  • Workaround: In Nitro Pro- go to File- Save As and then save it to Worksite.

  • Issues with Digital Signature
    • When more than one signature is applied, the document is locked. Additional signers are unable to sign the document.
    • Nitro Pro is unable to clear digital signatures created by the document owner.
    • Unable to use existing signature profiles when signing a document.
    • Workaround: Create a new signature profile to sign a document.



Resolved Issues

  • Security update. A recent Nitro Pro 10 security update has now been applied to Nitro Pro 11. More details are available here.
  • Nitro Pro Customer Success data fixes. Nitro Pro usage data fixes have been applied so that certain Enterprise customers will now have more complete data.
  • Improved User Experience. Nitro Pro will now show an error when combining corrupt PDF documents.
  • Occasional Nitro Pro crashes. This has been resolved in this patch.

Known Issues

  • An error appears when user tries to replace all pages in a document. This release has an issue when replacing documents that have the same number of pages.
  • Workaround: Insert a blank page, replace a document and then delete the blank page.

  • New or custom stamp thumbnails are appearing as blank. This release has an issue with displaying stamp thumbnails in recently used or custom section. This doesn’t affect the functionality to insert stamps.
  • Nitro Pro does not behave as expected, when printing ‘Current View’ of a document. The page will print blank, or only part of the page will be printed. This affects physical printing and printing to PDF.



New Features

  • Support for multiple windows with new drag and drop functionality. This feature is released as a preview, requiring a registry change to enable
  • New native DMS connector for Sharepoint 2013 and Alfresco based on the open-architecture CMIS standard. Nitro Pro now supports multiple servers of a single type


  • Improved compare feature with more accurate detection of word level changes in text-based documents

Resolved Issues

  • Improved performance in Nitro Pro for managing documents with a large number of tags
  • Certain types of form fields did not display correctly in Pro 11
  • Digital certificates and signatures did not work properly with certain types of card readers
  • The IDAutomation font was not recognized by Nitro
  • Converting certain Word documents to PDF caused an error



New Features

  • Box native integration now enables you to open files from and save files to an online Box account via the Backstage menu
  • Russian, Japanese and Simplified Chinese OCR modules are available for enterprise customers


  • Nitro for Enterprise user interface has been optimized for both perpetual and subscription modes
  • Auto-repaired files no longer trigger a Save As dialog box
  • Enterprise deployment utility redundant options have been removed
  • Batch processing and print workflows trigger usage tracking events

Resolved Issues

  • Nitro Pro Enterprise could revert to Trial Mode after an update
  • Nitro PDF Creator was sometimes removed upon an upgrade from a prior version of Nitro Pro to a new one
  • Dropbox user limit that prevented certain users from connecting their Dropbox accounts has been removed
  • Special characters were not displayed correctly in cloud storage file menus
  • Unicode characters were not displayed correctly in certain combo boxes



New Features

  • Localization builds are now available after being updated with translations for new strings
  • Web Browser plugin provides a better user experience when JavaScript commands are triggered

Resolved Issues

  • Localization improvements - major items include:
    • Truncation of options within dropdown menus
    • Dialog items overlapping and not aligned
    • Default profiles for Headers and Footers, Watermarks and Scan Profiles were not translated
  • Certify Profile Wizard would crash Nitro Pro during certain scenarios
  • PDF Forms with specific configurations would cause Nitro Pro to crash when loaded
  • Scrolling through pages using the slider while in Single Page View could lead to a crash
  • Search results that were continually scrolled through multiple times could cause a crash
  • Hyperlinks were not being processed correctly when converting PowerPoint files to PDF
  • Word add-in would display an error message when trying to convert Word document using a custom page size to PDF
  • Export to Word function was not overwriting existing files when requested during the export process
  • Export to Word function would sometimes not have the correct page numbers in the footers of the output
  • Bookmarks that were not created following the PDF specification were causing Nitro Pro to freeze
  • Edit Links would cause a crash on specific file that contained link objects without a defined rectangle
  • Outlook add-in caused a conflict with NFS Meeting Room Outlook plugin



New Features

  • Upgraded Interface maintains the Microsoft Office 2016 look and feel with new color schemes and icons
  • Customize Tools feature allows you to place up to 5 of your favorite tools onto the Home ribbon for easy access
  • Smart Tips will present themselves based on your usage which will either provide information, or recommended options to help with your workflow
  • Dropbox, OneDrive & Google Drive online storage systems are now directly integrated into the Open and Save backstage menus, allowing you to browse your accounts for PDF files without leaving Nitro's UI
  • Microsoft RMS 2 supported via compatibility with Protected PDF (.ppdf) filetype
  • Booklet Printing will automatically place your pages in the correct order when printing, ready for easy folding and binding


  • Print dialog moved to backstage, providing a larger print preview and following Microsoft Office's print workflow
  • Ribbon layout has been re-designed for better categorization of the available tools
  • Optical Character Recognition (OCR) has new pre-and-post processing techniques to provide better results
  • Launch speed has been boosted due to changes in how Nitro loads its plugins
  • PDF Creation speed has been significantly increased
  • Opening files via mapped/network drives is now much faster
  • DMS Connector now supports SharePoint 365
  • Enhance Thin Lines option in preference to allow improved rendering of cell borders at varying zoom levels

Resolved Issues

  • Nitro PDF Creator was unable to install due to Microsoft Update 3170455
  • Increased program stability due to specific internal changes to the source code
  • Batch OCR processing would cause a spike in memory
  • XFA compatibility improvements - major items include:
    • 24-hour time/date fields were not allowing the correct value to be entered
    • Radio and Checkbox buttons were not functioning on certain PDF files
    • Barcode fields not being printed when the file has not been scrolled through
  • File operations for files opened via network locations now have increased stability, causing a reduction of error code 0x400D003B
  • Detect text orientation setting when making a document seachable via OCR would rotate the scanned image incorrectly for particular PDF files, cutting off content
  • PDF creation from Autodesk 2016 would misalign and render text incorrectly
  • Select Tool was not selecting and pasting data that was in columns into the logical order
  • Font Substitution was replacing Arial Bold with Arial Black font when font embedding was not used in the PDF
  • Stamps were showing up blank if the source file was created via Nitro's Word addin
  • Conversion Optimization setting was set to "Web Ready" by default for the Offcie addins instead of "Office Ready"
  • Barcode - 'Compress before encoding' checkbox corrupts barcode on mobile scanners
  • Print Current View for PDF with large paper size dimensions would incorrectly show the current view
  • SharePoint "Required Fields" were not being prompted when saving a file via the DMS Connector
  • Advanced Search was not displaying ampersand character in the search results field

Nitro System Requirements & Deployment Options

Nitro supports most common deployment methods and system requirements, making it fast and easy to deploy, maintain and update across large enterprises.


Client-side deployment (push installations)

  • Industry standard deployment tools. Install and manage our software using Microsoft Active Directory (AD), System Center Configuration Manager (SCCM), or other deployment managers that support Microsoft Installer (MSI) files.
  • Command line installation for silent, automated activation of serial numbers.
  • Nitro Pro also works with roaming profiles so users can access their own preferences from whatever computers they access on networks running AD.

Server-Side Deployment

  • PDF for Citrix and Terminal Server Software
  • Nitro products support server-based hosting, allowing you to run and manage Nitro from one central location with:
    • Remote Desktop Services
    • Terminal Services
    • Citrix XenApp (Published Desktop/Application)

System Requirements

Nitro Pro Desktop System Requirements

  • Desktops: Windows 10, 8, and 7 (64 bit)
  • Servers: Microsoft Windows Server 2008 R2, 2012, and 2012 R2 (64 bit)
  • Processor: 1.5 GHz or faster
  • RAM: 1GB
  • Available Hard Disk Space: 4.5GB
  • Display screen resolution: 1024x768
  • Microsoft Office Integrated Features: MS Office 2013 (32bit or 64bit), 2016 (32bit or 64bit)
  • Video hardware acceleration (optional)

Nitro Cloud Browser Requirements (in addition to desktop requirements above)

  • Microsoft Windows 10, 8 or 7 using Internet Explorer 11, Firefox, or Chrome
  • Mac OS X v10.9 or later using Safari 9 or later, Firefox, or Chrome
  • Mobile browsers:
    • iPad Tablets: Chrome and Safari (down to 768px or 7” equivalent to iPad portrait)
    • Android Tablets: Chrome (down to 768px or 7”)
    • Other tablets and smartphones: Receiving, viewing and e-signing documents are supported on all devices and all browsers.

Multi-Language Support:

  • The Nitro Pro desktop app is available in the following languages:
    • English
    • German
    • Spanish
    • French
    • Italian
    • Dutch
  • The Nitro Cloud browser app is available in English only.

Software Sunset Policy

Scope of Policy

The Software Sunset Policy ('the Policy') applies to the following products: Nitro Pro.

The following products are discontinued and do not fall under the scope of the Policy: Nitro Reader, Nitro PDF Express, PrimoPDF.


Critical updates are a subset of minor updates and are aimed at resolving the following product issues:

  • Critical security updates: Issues within the software that, if not addressed, pose a high risk and probability of unauthorized access, alteration or destruction of information on a user's computer or connected computers.
  • Critical software issues: Issue renders the software completely inoperable and affects all users.
  • Major software issues: Issue materially impairs a major software feature, with no reasonable work-around available.

Current release means the latest major upgrade in the market.

Previous release means the major upgrade immediately preceding the current release.

Discontinued release means the major upgrades older than the previous release, or products/versions that have been otherwise sunset and are no longer supported.

Major upgrade means products released to market where the first number of a version increases (eg Nitro Pro v10 to Nitro Pro v11).

Minor update means products released to market where any secondary number of a version increases (eg Nitro Pro v11.0.4 to Nitro Pro v11.0.5).

Premium support means prioritized ticketed support with 2 hour first response time.

Products With respect to the Policy, products include Nitro Pro, Nitro Reader, Nitro PDF Express and PrimoPDF.

Software Assurance means Software Assurance or SA (previously known as the Nitro SAP - Software Assurance Program). This gives the user all major upgrades and minor updates, unlimited access to Premium Support for a period of 12 months from the purchase date.

Software Sunset Policy ('The Policy')

Important The following should be viewed as guidelines, rather than strict rules.

Unless specified to the contrary, Nitro will provide critical and minor updates for the current release, until such time as a new major upgrade is released.

Unless specified to the contrary, Nitro will only provide critical updates for the previous release, until such time as a new major upgrade is released. Nitro, at its discretion, may also provide a major upgrade to the current release, instead of a critical update to a previous release, to provide a critical update.

Unless specified to the contrary, Nitro will not provide any updates, upgrades or releases (major or minor, critical or otherwise) for discontinued products.

Minor updates and critical updates will be supplied, regardless of a customer's software assurance status.

Transitioning between release phases

When a new major upgrade is released to market:

  • It becomes the current release;
  • The existing current release becomes the previous release; and
  • The previous release becomes a discontinued release.

Nitro's rights under the policy

Nitro reserves the right to alter, append or repeal part or all of the Policy at any time. Nitro reserves the right to make exceptions to the Policy on a case-by-case basis.

Current Product Status

Nitro Pro

Version Release Date Status
Nitro Pro 12 12-June-2018 Current
Nitro Pro 11 23-November-2016 Previous
Nitro Pro 10 09-June-2015 Discontinued
Nitro Pro 9 30-Sep-2013 Discontinued
Nitro Pro 8 12-Sep-2012 Discontinued
Nitro Pro 7 02-Nov-2011 Discontinued
Nitro Pro 6 15-Jun-2009 Discontinued
Nitro Pro 5 01-Mar-2007 Discontinued
Nitro PDF Professional 06-May-2005 Discontinued

Nitro Reader

Version Release Date Status
Nitro Reader 5 9-Mar-2016 Discontinued
Nitro Reader 3 10-Oct-2012 Discontinued
Nitro Reader 2 21-Jun-2011 Discontinued
Nitro Reader 1 25-May-2010 Discontinued

Nitro PDF Express

Version Release Date Status
Nitro Express 2 21-Dec-2009 Discontinued
Nitro Express 1 01-Jun-2007 Discontinued

Primo PDF

Version Release Date Status
Primo PDF 5 N/A Discontinued