UPDF – The Best PDF Annotator to Boost Your Productivity


In today’s digital age, PDF documents have become a crucial tool for various purposes, including sharing, collaborating, and archiving. Annotating features in PDF software make it easier to add comments, highlight, and mark up documents for effective communication. In this article, we will introduce a popular PDF software tool that provide a range of annotating features – UPDF. UPDF allows users to add comments, stamps, signatures, and shapes to their PDF documents, and users can easily share annotated documents via a link.

At the end of this article, we also make a comparison between UPDF and Adobe Acrobat.  In this comparison, we will focus on the UPDF annotation features and how they compare to Adobe Acrobat. Let’s dive into the details and explore the unique features of UPDF annotations and how they stack up against Adobe Acrobat.

What Makes UPDF the Best PDF Annotator? Overview of UPDF’s Annotating Features

UPDF offers a range of annotating features that make it easier to communicate and collaborate effectively on PDF documents. From adding comments and stamps to creating signatures and shapes, UPDF provides users with the necessary tools to make their PDF documents more engaging and informative. The following tools will help you annotate PDFs easily.

Comments in PDF Documents

UPDF allows users to add comments to PDF documents, making it easier to communicate and collaborate effectively. Users can highlight, underline, or strike out text and add text boxes and sticky notes to provide feedback and make suggestions.

Stamps and Stickers

UPDF offers users over 100 different kinds of stamps and stickers to add to their PDF documents. 

Users can even create custom stamps and add them to any section of the document. Stamps and stickers are an excellent way to add visual elements to the document and provide context.


UPDF allows users to draw a handwritten signature or type in an electronic signature. Signatures can be easily moved to any section of the document, making it convenient to sign contracts, forms, and other important documents.


UPDF offers a range of shapes that users can insert into their PDF documents, including rectangles, ovals, arrows, and lines. 

Users can control the properties of these shapes by changing their style, thickness, border and fill colors and opacity. Shapes are an excellent way to add structure and clarity to a document.

Share Annotated PDF via a Link

UPDF provides users with the opportunity to share their annotated PDF via a link after completing the requested task. 

Moreover, users receiving the PDF document through the link can view, copy, download, or print the PDF without downloading any PDF software, ensuring the best environment for coherent collaboration.

How to Annotate PDF with the Best PDF Annotator – UPDF

UPDF is a freemium PDF annotator that makes it simple to mark up PDF documents with annotations like highlights and underlines. If you want to add comments to a PDF, you can do so by following these instructions.

For Windows Users

  1. The first step is to start up UPDF, after you’re able to upload your file by selecting “Open File” from the UPDF interface.
  2. To begin annotating a PDF, simply select the “Comment” tab at the top. Highlighting, underlining, and striking out are all ways to annotate the text. A text comment, a text box, or a sticky note are also available for your consideration.
  3. Rectangles, ovals, arrows, and lines, among other shapes, can be added to a PDF document. You may also change the visual appeal of the shape by adjusting its style, thickness, fill color, opacity, and text color.

For Mac Users

  1. Start up UPDF and load the PDF you want to work with.
  2. Simply select the “Comment” tab to begin annotating.
  3. Use the extensive set of annotation tools available in the main toolbar to mark up your Document.
  4. Make sure to save the file with a new name that reflects the changes you made.

Additional Features of UPDF Annotator and Editor

Editing PDF Documents

Having the ability to make changes to PDF files is a major selling point for UPDF. UPDF streamlines the process of editing PDF files. Read, Comment, and Edit PDF are the three primary viewpoints available from the main menu.

To begin editing your PDF immediately, click the Edit PDF button. Then you will enter the editing mode. You are able to edit any text, image, and links on the PDF document.

Organizing PDF Files

In addition, UPDF allows you to organize PDF pages easily. It enables you to perform actions like splitting a document and inserting, removing, replacing, rotating, or extracting pages.

Unsurprisingly, Crop Pages lets you crop pages and adjust margins.

With Page Tools, you may customize the look of your pages by adjusting the background color, adding or removing watermarks, and adjusting the headers and footers.

Optical Character Recognition (OCR)

UPDF’s capacity to perform OCR-based changes on PDF documents is also notable. By using this advanced program, users can extract text from a PDF file’s images. 

With this, you may convert image-based PDFs into searchable or editable documents. UPDF’s OCR supports a total of 38 different languages!

UPDF Vs. Adobe Acrobat

As an alternative to Adobe Acrobat, UPDF is worth considering. UPDF offers nearly all of Adobe Acrobat’s features at a much lower price. Let’s compare and contrast UPDF and Adobe Acrobat to see the key differences between the two.

Improved User Interface Design

The quality of a program’s UI is highly indicative of how the user perceives the program. In contrast to a badly designed UI, which can make it difficult for users to perform tasks and can create annoyance, a well-designed UI will make the product easy to browse and use.

When choosing between Adobe Acrobat and UPDF, it’s best to go with the latter because its tool structure is more user-friendly and straightforward. While completing a task, it might be beneficial to have a design that is uncluttered and easy to use.

Improved Performance

When comparing PDF tools, performance is a crucial factor. In order to maximize their time and efficiency, users should select a PDF tool that allows them to swiftly access and saves documents, as well as accomplishes operations like editing and converting. UPDF clearly has a better performance.

Support for Many Devices

UPDF can be used on all platforms with just one purchase. It’s important to the user since it’s one of the few things they care about. 

While Adobe Acrobat and UPDF both provide cross-platform support, only UPDF does so without requiring users to upgrade to a paid version.

Moreover, four devices running Windows, iOS, Mac OS, and Android all share a single UPDF license.


We strongly suggest that you use UPDF for the work if you have a requirement for total control over PDF documents. It is possible that this is the best all-in-one PDF solution available at the most reasonable cost.

The application is available for free download on all major platforms, including Windows, Mac OS, iOS, and Android. 

You will get complete access to all of the features in both the free iOS and Android versions. The free desktop versions have several limitations, such as the addition of watermarks to the files that are saved and a limit of only being able to convert five documents in total.

However, if you want to upgrade, you can do so without any problem because the paid version is so much more cost-effective as compared to Adobe Acrobat and other PDF editors.

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