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

Annotate PDF files

Review and annotate PDF files using a rich set of annotating tools in the Angular PDF Viewer.

Highlight text

Highlight important text in Vue PDF files. Also, customize the appearance of the highlight or remove it.

Highlight important text in ASP.NET Core PDF files. Also, customize the appearance of the highlight or remove it.

ASP.NET Core PDF Viewer Highlight Text

ASP.NET Core PDF Viewer Underline Text

Underline text

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


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

ASP.NET Core PDF Viewer Strikethrough

ASP.NET Core 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.

Calibrate - Measuring tools

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

ASP.NET Core PDF Viewer Calibrate - Measuring Tools

ASP.NET Core 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.

Free text annotation

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

ASP.NET Core PDF Viewer Free Text Annotation

ASP.NET Core PDF Viewer Handwritten Signature

Handwritten signature

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

Sticky notes and comments

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

ASP.NET Core PDF Viewer Sticky Notes and Comments

Import and export annotations in Vue PDF Viewer.

Import and export annotations

Annotations in a PDF document can be exported as JSON or XFDF and stored in the database. The annotations in JSON or XFDF formats can be imported back to the PDF document..

Other supported frameworks

The PDF Viewer component is also available in Blazor, Angular, React, Vue, JavaScript, and ASP.NET MVC frameworks. Check out the different PDF Viewer platforms from the links below,

Supported browsers

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

Supported browsers


Scroll up icon

Warning Icon You are using an outdated version of Internet Explorer that may not display all features of this and other websites. Upgrade to Internet Explorer 8 or newer for a better experience.Close Icon

Live Chat Icon For mobile
Live Chat Icon