What libraries exist to replace text in a PDF or fill PDF form field? I am looking for something free and cannot use iTextSharp's free version due to the licensing requirement to post my source code.


Syncfusion Essential PDF can be used to replace text in a PDF or fill a PDF form field.

Essential PDF Header and Footer

Live samples for ASP.NET Core, but the libraries are supported on Windows Forms, WPF, Silverlight, ASP.NET and ASP.NET MVC, WinRT, Windows Phone, Windows store universal and Xamarin applications as well.

VB.NET code is provided for all code samples.

A single license for the File Formats Edition costs $995. The whole product is also available for free through the community license if you qualify (less than 1 million USD in revenue).

Note: I work for Syncfusion.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.