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The Blazor PDF Viewer is an 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.

Blazor PDF Viewer Overview

High performance

Blazor PDF Viewer Instant Loading

Instant loading

Load PDF files with thousands of pages instantly.

Blazor PDF Viewer Less Runtime Memory

Less runtime memory

On-demand loading and virtualization hold only the minimum required pages at runtime to reduce memory consumption.

Blazor PDF Viewer Virtualized Pages

Virtualized pages

Render pages on demand to help reduce initial load time when working with large PDF files.

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. You 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 rectangle, circle, ellipse, line, arrow, and polygon 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. You 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 anywhere in a PDF file. It can be moved and removed.

Blazor PDF Viewer Handwritten Signature

Handwritten signature

Add handwritten signature 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

It supports the import and export of annotations and form data.

Import and export annotations with Bazor 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.

Import and export annotations with Bazor PDF Viewer

Import and export form data

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

Blazor PDF Viewer Responsive Rendering

Responsive rendering

It is engineered to be responsive and to withstand changes in the size of the parent element.

Printing PDF

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

Blazor PDF Viewer Printing PDF

Blazor View PDF Built-in Toolbar

Built-in toolbar

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

The 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 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

It 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 through them found occurrences easily.

Blazor PDF Viewer Search Text


Blazor PDF Viewer Applying a Theme.

Applying themes

Choose from several built-in SASS-based themes are available such as Tailwind CSS, Bootstrap 5, Bootstrap 4, Bootstrap, Material, Fabric, and High Contrast. Simplify theme customization either by overriding the existing SASS styling or creating custom themes by using the Theme Studio application.

Blazor PDF Viewer toolbar customization

Toolbar customization

Design your own toolbar with Blazor PDF Viewer APIs.


All static text within the PDF Viewer can be localized to any supported language.

Blazor PDF Viewer Localization

Blazor PDF Viewer RTL

Right to left (RTL)

It supports RTL direction rendering for users working in right-to-left languages.

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.

<SfPdfViewerServer DocumentPath="@DocumentPath" Height="500px" Width="1060px" ></SfPdfViewerServer>

private string DocumentPath { get; set; } = "/pdf/PDF_Succinctly.pdf";

Other supported frameworks

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

Blazor PDF Viewer Supported Browsers

Supported browsers

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

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 Viewer in the market that offers feature-rich UI to interact with the software.
  • Simple configuration and API.
  • Supports all modern browsers.
  • Mobile-touch friendly and responsive.
  • Extensive demos, documentation and videos to learn quickly and get started with Blazor PDF Viewer.

We do not sell the Blazor PDF Viewer separately. It is only available for purchase as part of the Syncfusion Blazor suite, which contains over 80 native Blazor components, including the PDF Viewer. A single developer license for the Syncfusion Essential Studio for Blazor suite costs $995.00 USD, including one year of support and updates. On top of this, we might be able to offer additional discounts based on currently active promotions. Please contact our sales team today to see if you qualify for any additional discounts.

You can find our Blazor PDF Viewer demo here.

No, our 80+ Blazor components, including PDF Viewer, are not sold individually, only as a single package. However, we have competitively priced the product so it only costs a little bit more than what some other vendors charge for their PDF Viewer alone. We have also found that, in our experience, our customers usually start off using one of our products and then expand to several products quickly, so we felt it was best to offer all 80+ Blazor components for a flat fee of $995/developer. On top of this, we might be able to offer additional discounts based on currently active promotions. Please contact our sales team today to see if you qualify for any additional discounts.

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.

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