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WinUI PDF Library - Overview

The Syncfusion PDF Library is a feature-rich and high-performance WinUI PDF library that allows you to add robust PDF functionalities to any WinUI application. It allows you to create, read, and edit PDF documents programmatically. This library also offers functionality to merge, split, stamp, form-fill, and secure PDF files.

Overview diagram of WinUI PDF Library.

General information

Blazing-fast performance

Optimized performance to work in an environment where speed and low memory usage are critical.

Powerful and comprehensive API

All the elements in a typical PDF document like text, formatting, images, shapes, and tables are accessible through a comprehensive set of APIs.

Create, modify, and save PDF files

Essential PDF gives you the ability to create PDF documents from scratch and save them to a disk or stream with just a few lines of code. Existing documents can also be opened and manipulated.

Fully documented

Syncfusion Essential PDF comes with extensive documentation, a knowledge base, and samples.

PDF forms

Create forms in WinUI PDF Library.

Create forms

Create AcroForms from scratch or existing documents to collect information from users.

Edit forms in WinUI PDF Library.

Edit forms

Move fields around. Change fields’ border color, fonts, size, etc. Add, delete, and edit form fields.

Fill forms in WinUI PDF Library.

Fill forms

Fill AcroForms with database information quickly and effortlessly or directly from an internet or intranet user.

Flatten forms in WinUI PDF Library.

Flatten forms

Flatten an AcroForm to remove the editing capability of the document.


Merge or append PDFs.

Merge or append PDFs

Merge different PDF documents or pages into single PDF document to archive or to add title pages to a document.

Split PDFs.

Split PDFs

Split a PDF document of many pages into a smaller PDF document to remove unwanted pages, blank pages, and more.



Rearrange the pages within the PDF document to make the document more meaningful.



Create a portfolio that allows you to bundle related documents together. Extract and delete files from the portfolio.


Watermark existing PDFs.

Watermark PDFs

Existing documents can be loaded and stamped with text or images.

Extract text.

Extract text from PDFs

Text in a document can be extracted. The layout of text in a PDF is preserved during its extraction.


Data binding.

Data binding

Data can be easily imported from an IEnumerable collection.



Create richly formatted tables to keep your data organized, with both basic and advanced operations in cells, rows, and columns.



Built-in table styles are available and will look like Microsoft Word table styles. More advanced styling options are also available.


Encrypt and decrypt PDFs.

Encrypt and decrypt PDFs

Essential PDF supports both AES and RC4 encryption algorithms as per the ISO 32000 standards and PDF 2.0 security to protect documents against unauthorized access.

Digitally sign PDF files.

Digitally sign PDF files

Documents can be digitally signed using x509 certificates such as .pfx files with private keys with support for the online certificate status protocol (OCSP) and certificate revocation list (CRL) to offer authenticity and integrity.

Interactive elements



Add, edit, and remove comments with highlighting, mark-up, free text, and 17+ annotations.

PDF actions.

PDF actions

Add predefined actions like form actions, launch actions, and named actions, to attachments, form fields, and annotations. PDF Library also supports custom PDF JavaScript actions.



Add bookmarks to a PDF document to allow navigation interactively from one part of the PDF document to another. Editing and deletion of bookmarks are also supported.



Add, extract, and delete attachments from a PDF document. The attachments can be of any file format.




Create a tagged PDF or PDF/UA with standard compliance with section 508 for the people who require assistive technologies when reading electronic content.



Create ZUGFeRD-compliant PDF invoices to exchange structured data in public and private sectors. These are human-readable invoices with text, graphics, and images, and machine-readable, structured invoice data in XML format.


Barcode 1D.

1D barcodes

Create 1D or linear barcodes in a PDF document with vector quantity and save as raster images. Supported 1D barcodes are code39, codabar, code128a, and more.

Barcode 2D.

2D barcodes

Create 2D barcodes in a PDF document with vector quantity and save as raster images. Supported 2D barcodes are QR code, Data Matrix, and PDF417 barcode.

Feature Matrix

Document and Page Features WinUI
Create a PDF document from scratch or modify an existing document. Yes
Save the PDF document to a local or storage file. Yes
Save the PDF document to a stream. Yes
Open existing PDF documents from local or storage file. Yes
Open existing PDF documents from stream. Yes
Standard and custom page sizes. Yes
Portrait and landscape orientations. Yes
Document properties. Yes
XMP metadata. Yes
Custom metadata. Yes
PDF standards conformance such as to PDF A1/B, PDF A2/B, and PDF A3/B. Yes
Viewer preferences. Yes
PDF portfolio. Yes
Page layers. Yes
Headers and footers. Yes
Page labels. Yes
Automatic fields such as page number field, date field, etc., for specific pages or the entire document. Yes
Tagged PDF with section 508 compliance. Yes
Add digital signatures using x509 certificates. Yes
Enable long-term validation (LTV) PDF signatures. Yes
Encrypt/decrypt PDFs using 40-bit and 128-bit RC4 algorithm. Yes
Encrypt/decrypt PDFs using 128-bit and 256-bit AES algorithm. Yes
Encrypt/decrypt PDF using 256-bit AES algorithm with revision 6. Yes
PDF contents
Add single, multiline, and multipage text with various standard and TrueType fonts. Yes
Align text in RTL format for languages such as Arabic and Hebrew. Yes
Apply text formatting including colors, alignments, line and character spacing, etc. Yes
Add complex script language text such as Thai, Hindi, and Tamil. Yes
Embed JPEG and PNG images. Yes
Paginate images across multiple pages. Yes
Add watermarks to the document using text or images. Yes
Create richly formatted tables that can span across multiple pages. Yes
Add geometric shapes like lines, rectangles, paths, and curves to the page graphics. Yes
Apply pen and brush for graphic elements such as text and shapes. Yes
Support for various color spaces such as CalRGB, CalGray, Indexed, and Separation. Yes
Apply patterns and shadings to the graphics. Yes
Insert hyperlinks that can navigate to a webpage, remote file, or even to a different region in the same document. Yes
14 types of standard or base fonts. Yes
CJK (Chinese, Japanese, and Korean) fonts. Yes
TrueType fonts. Yes
Unicode TrueType fonts. Yes
Import from different data sources. Yes
Strongly typed IEnumerable objects. Yes
Add row, column, cell, and table formatting. Yes
Add row headers that can be repeated for all the pages. Yes
Paginate tables across multiple pages with the ability to handle horizontal overflow. Yes
Merge rows and columns. Yes
Create nested tables that span across pages. Yes
Create and modify forms. Yes
Support for form fields like push button field, checkbox field, radio button field, text box field, list field, and combo box field. Yes
Remove or reposition form fields. Yes
Flatten the entire form or specific fields in the documents. Yes
Import and export form data from FDF, XFDF, and XML files. Yes
One-dimensional barcodes: Code 39, Code 39 Extended, Code 11, Codabar, Code 32, Code 93, Code 93 Extended, Code 128A, Code 128B, UPC bar code, and Code 128C. Yes
Two-dimensional barcodes such as QR code, Data Matrix, and PDF417 barcodes. Yes
Interactive Elements
Add annotations with associated notes. Yes
Embed files as attachments. Yes
Create and modify bookmarks for easier navigation. Yes
Apply actions for elements such as form fields, bookmarks, and links. Yes
Flatten all annotations or a specific annotation in the documents. Yes
Annotation Types
Attachment annotation Yes
Document link annotation Yes
File link annotation Yes
Ink annotation Yes
Line annotation Yes
3D annotation Yes
Circle annotation Yes
Ellipse annotation Yes
FreeText annotation Yes
Polygon annotation Yes
Rectangle annotation Yes
Square annotation Yes
Text markup annotation Yes
Pop-up annotation Yes
Rubber stamp annotation Yes
Sound annotation Yes
URI annotation Yes
Measurement Annotations
Line measurement annotation Yes
Square measurement annotation Yes
Circle measurement annotation Yes
Action Types
Form action Yes
Goto action Yes
JavaScript action Yes
Launch action Yes
Named action Yes
Field action Yes
Reset action Yes
Sound action Yes
Submit action Yes
URI action Yes


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.

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