We use cookies to give you the best experience on our website. If you continue to browse, then you agree to our privacy policy and cookie policy. Image for the cookie policy date
Unfortunately, activation email could not send to your email. Please try again.
Syncfusion Feedback

Trusted by the world’s leading companies

Syncfusion Trusted Companies


The Blazor PDF Viewer is a UI component for displaying PDFs from byte arrays, streams, or file paths. In addition to being able to print PDFs, it supports reviewing PDFs with annotation tools. Thumbnails, bookmarks, hyperlinks, and tables of content provide easy navigation within and outside PDF files. Form-filling support allows filling and printing with AcroForms.

Overview of Blazor PDF Viewer

Why choose Syncfusion Blazor PDF Viewer?

Blazor PDF Viewer high performance

High performance

Thousands of PDF pages can be loaded instantly. On-demand loading and virtualization support helps reduce the initial loading time for larger PDF files.

Blazor PDF Viewer annotations

Rich annotating tools

The PDF Viewer offers various annotations including text markup, shape, stamp, sticky note, measurement, free-text, and ink.

Blazor PDF Viewer interaction modes

Easy to interact

Blazor PDF Viewer offers selection and panning interaction modes in your loaded PDF documents, making interaction easier.

Blazor PDF Viewer comments

Flexible comment panel

The comment panel is used to add comments as annotations, replies to comments, and statuses to the PDF file.

Blazor PDF Viewer handwritten signatures

Add handwritten signatures

You can add a handwritten signature to your PDF files, and customize them by resizing, moving, deleting, and saving them. They enhance the digital process.

Blazor PDF Viewer responsiveness

Adapts to any resolution

The Blazor PDF Viewer is designed to be responsive with an optimized design for desktops, touchscreens, and smartphones. It works well on all mobile phones that use iOS, Android, or Windows OS.

Blazor PDF Viewer Themes

Attractive, customizable themes

Cutting-edge design with several built-in themes, such as Fluent, Tailwind CSS, Bootstrap, Material, and Fabric. Utilize the online Theme Studio tool to customize themes easily.

Blazor PDF Viewer globalization

Globalization and localization

Enables users from different locales to use the component by formatting the text content to suit their preferences.

Blazor PDF Viewer Code Example

Easily get started with the Blazor PDF Viewer using a few simple lines of C# code example as demonstrated below. Also, explore our Blazor PDF Viewer Example that shows you how to render the PDF Viewer component in Blazor.

<SfPdfViewer2 DocumentPath="@DocumentPath"

private string DocumentPath { get; set; } = "https://cdn.syncfusion.com/content/pdf/pdf-succinctly.pdf";

Open PDF file

Open and display both normal PDF files and those protected with AES and RC4 encryption algorithms (password protected). Open PDF files from stream, file paths, and as byte arrays.

Blazor PDF Viewer Open Pages

Review or annotate PDF files

Review PDF files using a rich set of annotating tools in the Blazor PDF Viewer.

Blazor PDF Viewer Highlight Text

Highlight text

Highlight important text in PDF files. Users can customize the color of the highlight or remove it.

Blazor PDF Viewer Underline Text

Underline text

Underline notable text in PDF files. You can customize the color of the underline or remove it.

Blazor PDF Viewer Strikethrough


Strikethrough unimportant text in PDF files. You can customize the color of the strikethrough or remove it.

Blazor PDF Viewer Shape Annotations

Shape annotations

Use drawing tools to add rectangles, circles, ellipses, lines, arrows, and polygons to a PDF file. The shapes can also be moved, resized, and customized.

Blazor PDF Viewer Calibrate - Measuring Tools

Calibrate - Measuring tools

Measure the distance, area, radius, volume, and perimeter of the objects using measurement tools.

Blazor PDF Viewer Stamp Annotation

Stamp a document

Add stamps to a PDF file like applying rubber stamps to a paper document from the list of built-in stamps or create your own stamps.

Blazor PDF Viewer Free Text Annotation

Free-text annotation

Include free text in PDF files. Users can move, resize, remove, or edit the appearance of free text.

Blazor PDF Viewer Sticky Notes and Comments

Sticky notes and comments

Add sticky notes and comments anywhere in a PDF file. They can also be moved and removed.

Blazor PDF Viewer Handwritten Signature

Handwritten signature

Add handwritten signatures to PDF files. The signature can be resized, moved, removed, saved, and customized.

PDF form filling

Fill, edit, flatten, and save AcroForms fields in PDF files. The form fields displayed in the PDF Viewer are: 1. Text box 2. Password box 3. Combo box 4. Check box 5. Radio button 6. Signature field 7. List box

Blazor View PDF Form Filling

Import and export annotations in Blazor PDF Viewer

Import and export annotations

Annotations in a PDF file can be exported as JSON and stored in the database. You can also import annotation JSON data to a PDF file.

Responsive rendering

The Blazor PDF Viewer is engineered to be responsive and to withstand changes in the size of the parent element.

Blazor PDF Viewer Responsive Rendering

Blazor PDF Viewer Printing PDF

Printing PDF

The Blazor PDF Viewer supports printing the loaded PDF document along with adding and modifying annotation and signature details.

Built-in toolbars

The PDF Viewer comes with a powerful built-in toolbar to execute important actions such as page navigation, text search, and various annotation actions. Users can design their own toolbars as required with Blazor PDF Viewer APIs.

Blazor View PDF Built-in Toolbar

The Blazor PDF Viewer component supports different types of internal and external navigations.

Blazor PDF Viewer Bookmark Navigation

Bookmark navigation

Bookmarks saved in PDF files are loaded and made ready for easy navigation.

Blazor PDF Viewer Thumbnail Navigation

Thumbnail navigation

Thumbnails are miniature representations of the actual pages in PDF files. This feature displays thumbnails of the pages and allows easy navigation.

Hyperlink navigation in Blazor PDF Viewer control

Navigate to the URLs in a PDF file.

Blazor PDF Viewer Table of Content Navigation

Table of contents navigation

Navigate to the different parts of a PDF file that are listed in the table of contents.

Zooming and panning

Zoom in and out allows users to view a page closer and view a larger part of the page, respectively. Additionally, users can navigate by panning from one region of the PDF Viewer page to another.

Blazor PDF Viewer Zooming and Panning

Blazor PDF Viewer Select and Copy Text

Select and copy text

Allows users to select and copy text from PDF files. This is helpful for copying and sharing text content.

Search text

Locate all occurrences of a given text and navigate to them easily.

Blazor PDF Viewer Search Text

Blazor PDF Viewer toolbar customization

Toolbar customization

Create a custom toolbar with any of the options that can be performed using the built-in toolbar.


Keyboard navigation in Blazor PDF Viewer

Keyboard navigation

The Blazor PDF Viewer component ensures that every tool is accessible using the keyboard. Major operations like open file, page navigation, zoom ratio, add comments, show or hide annotation and form designer toolbars, print, and download can be done without any mouse interaction. This helps in creating highly accessible applications.

Blazor PDF Viewer RTL

Screen reader

The Blazor PDF Viewer has complete WAI-ARIA accessibility support. The PDF Viewer UI includes high-contrast visual elements that help visually impaired people to have the best viewing experience. Also, valid UI descriptions are easily accessible through assistive technologies such as screen readers.

Blazor PDF Viewer RTL

Right to left (RTL)

Right-to-left rendering allows displaying the text and layout of the PDF Viewer from right to left. This improves the user experience and accessibility for RTL languages.

Other supported frameworks

PDF Viewer is also available in Angular, React, Vue, JavaScript, ASP.NET Core, and ASP.NET MVC frameworks that are built from their own TypeScript libraries. Check out the different PDF Viewer platforms from the links below,

Supported browsers

The Blazor PDF Viewer works well with all modern web browsers such as Chrome, Firefox, Microsoft Edge, Safari, and Opera.

Supported browsers

Blazor Components – 80+ UI and DataViz Components

Frequently Asked Questions

The Syncfusion Blazor PDF Viewer supports the following features:

  • Accurate and reliable PDF rendering.
  • Easy navigation and interactions.
  • Review PDF files with annotating tools such as text markup, shape, measure, free-text, stamp, and sticky notes.
  • Supports filling and editing of AcroForms.
  • One of the best Blazor PDF Viewers in the market that offers a feature-rich UI to interact with the software.
  • Simple configuration and APIs.
  • Supports all modern browsers.
  • Mobile-touch friendly and responsive.
  • Extensive demos, documentation and videos to learn quickly and get started with Blazor PDF Viewer.

You can find our Blazor PDF Viewer demo, which demonstrates how to render and configure the PDF Viewer.

No, this is a commercial product and requires a paid license. However, a free community license is also available for companies and individuals whose organizations have less than $1 million USD in annual gross revenue and five or fewer developers.

A good place to start would be our comprehensive getting started documentation.

Our Customers Love Us

Having an excellent set of tools and a great support team, Syncfusion reduces customers’ development time.
Here are some of their experiences.

Rated by users across the globe

Transform your applications today by downloading our free evaluation version Download Free Trial


Greatness—it’s one thing to say you have it, but it means more when others recognize it. Syncfusion is proud to hold the following industry awards.

Up arrow icon
Live Chat Icon For mobile