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Top 5 Open Source PDF Reader in 2022

Personal or business, work-wise, PDF files are the most popular where most people find it easier to manage and transfer. Viewing and sharing PDFs has now been made simple thanks to loads of PDF software that are developed just for the job and are made available to be utilized on your desktops.

Moreover, you may also send a PDF file as an attachment to an email or over instant messaging but editing these types of files may demand you more than just simple software. Using an open source PDF reader for Windows is an excellent way to modify PDF files seamlessly as you may skip the headache of converting PDFs into a new format to edit them by considering these top few editors we already prepared for you with the finest ratings.

Top 5 Best Open Source PDF Reader

1.   UPDF

At the helm of this list of great PDF software is undoubtedly the best open source PDF reader you should have, UPDF. This software is placed ahead of the other PDF readers for windows a reason the UPDF has its own unique way to get the job done while only requiring a few clicks to start working with your PDF files. Pdf reading can now be done in the easiest manner in a very friendly application-the UPDF.

updf  pdf reader

It doesn't take long to get started with this program in order to achieve those high-quality changes to your PDF files, and it immediately offers you the feel of a premium product while providing you with all of the capabilities you need for free. You can do more than just read and edit PDF files with the UPDF; it also has several useful tools for annotating and organizing your PDF's contents.

Other functions include text highlighting, underlining, strikeouts, and noting texts, as well as removing, adding, and rotating the pages of a PDF file. You'll also love its OCR feature which is very smart for including those images found on your PDFs to convert to editable texts.

updf pdf viewer

As versatile as it may seem with all these handy features you can do, the UPDF is reliable open-source software which will have improved features for you to have such as a smart collaborative feature, very light and compact file size, and cloud integration capability.


  • Versatile and free-to-use.
  • Very user-friendly and elegant interface.
  • Super experience with PDF editing. Modify texts on your PDF document easily.
  • Edit images in PDF by cropping, rotating, resizing, etc.
  • Read and view PDF documents with various modes.
  • Add annotations to PDF documents according to your needs when reading PDF.
  • Supports Windows and Mac systems.

2. Adobe Reader Open Source

Next in line is the software furnished by the same company that started it all for PDF files- Adobe. The Adobe Acrobat Reader is also an open source PDF viewer you can have if you are for those very advanced gizmos and tools to do more than just view your PDF files but also edit them and apply the changes you desire.

Different reading modes, text highlighting, making notes, filling forms, digital signatures, adding stamps, and other features are only among the best you can have with Adobe Reader open source that surely is useful for most users' PDF file management experience.

This Adobe program also offers a tabbed design that allows you to open several PDF files at once. It's also the best PDF reader for processing large files that other lightweight programs can't handle, and it costs $14.99 per month. So you can also learn some Adobe reader alternatives if needed.


  • Supports sync with other adobe platforms
  • High-quality conversions to multiple formats
  • Advanced editing


  • Not beginner-friendly
  • Price is expensive
adobe reader open source

3. Foxit Reader Open Source

The next significant item to attempt to improve your PDF reading experience is Foxit Reader, which is a well-known name in the world of document readers, similar to Adobe Acrobat Reader DC, although Foxit is far lighter than Adobe's PDF reader. Not long ago, Foxit also revealed its new online ConnectedPDF Document Management System. Its Text Viewer option removes the file's sophisticated formatting and exposes it in a Notepad-like manner. Collaboration capabilities improve your PDF experience even further by allowing you to work online and share your PDF with others.

The complete edition of Foxit Reader open source is a powerful tool for viewing PDF files as well as organizing large amounts of information for enjoyable work, and it can be purchased for only $89 once.


  • Cloud-based tools are integrated.
  • Can work simultaneously or collaboratively.
  • Specifically created for high-quality editing and printing.


  • You may be forced to buy the licensed version to access full features.
  • Not space-wise(takes up many system processes).
foxit reader open source

4. LibreOffice

For all operating systems, especially Windows, LibreOffice is one of the most remarkable open-source PDF editors you can have. You can modify words and photos, as well as whiteout and type on top of the text you wish to redact.

In the field of PDF editing, LibreOffice is a formidable contender. It is similar to MS Office in that it's free and open-source software. It's an excellent alternative for those who are unable to utilize proprietary software. It comes with all of the functionality you'd expect from a good open-source PDF editor.

LibreOffice is a popular alternative to Microsoft Office, despite its inconsistency in terms of the user interface. Although it is a powerful word processor, it struggles to edit PDF files. However, it will allow you to perform rudimentary editing.


  • Can edit, add or delete pages on PDF as well.
  • Free to use.


  • Limited editing feature.
  • May not be ideal for large PDF files.
open source pdf reader for windows

5. Google PDF Reader

To clinch the list of open source PDF viewer windows you certainly would not want to miss is the Google PDF reader. It is another open source software that is a dependent utility that primarily functions as an extension for the Google Chrome browser. You will have no trouble using this program as long as your browser is up and running, allowing you to read PDF files downloaded in a lightweight and quick manner.

You may use this free software to read PDF, DOC, XLS, and PPT files directly in your web browser because it only works on a local level, bypassing the server. You do not need to install any other software in order to begin reading PDF files. The files or PDFs you submit are not kept or shared, but they can be viewed using cloud-based services.

You do not have to pay to have this PDF reader while also being able to read and view the PDFs you download or have on your Windows desktop in just a jiffy so this deserves a spot on the list of the best open-source PDF viewer you can have.


  • Easily accessible for most users.


  • Cannot have all of the essential functions, such as modifying the PDF itself.
  • It's not a standalone program, but rather a browser extension.
best open source pdf reader

What to look for in an open source PDF reader

As you may have absorbed these PDF readers, there are a lot of key points to observe when it comes to choosing the finest open source PDF reader for you. Given the amount of work that must be done with these tools, you have to exert the effort to have those features that might range from offline Windows editors to online editors but offline ones have a greater degree of control over the variety of features than online editors so be also sure to include it as a standard.

You will know that a PDF reader software is the best pick for you when it is free, capable of doing more than just reading a PDF document, designed with an elegant interface with only a few quick steps to do the work for you, and is constantly providing you with benefits that are worthwhile in the long run.

When it comes to PDF files, using an open-source PDF editor is recommended since the user wants to do more than just edit them. There are a variety of free PDF readers available on the market; however, if you're seeking a better solution to excellent PDF reading that really has it all, the UPDF is the way to go.