Open Source PDF Document Management

🔏 Sign PDFs with the portuguese citizen card (aka "cartão de cidadão")

Simple frontend for OCRmyPDF (Windows only).

Lightweight Helper classes based on iTextSharp for scaling and resizing Pdf Documents & Pages.

Use the Azure Key Vault API to sign a PDF document.

Extract the text of a PDF document and count the words' occurrences in a document text.

Obtain a checked appearance name for a check box and specify the check box value.

Create a custom timestamp client based on the Bouncy Castle C# API.

Implement a custom signer based on the Bouncy Castle C# API and use a custom digest calculator to calculate a document hash.

Export a PDF document to multi-page Tiff and bitmap images.

Use the PDF Document API to rotate document pages and save the result.

Use a PdfGraphics object to add interactive form fields to a PDF document.

Access and modify custom document properties.

Extract the first page from a PDF document into a separate document.

Add a link to a URI at the specified link area on a document page.

Use the PdfDocumentFacade and PdfAcroFormFacade classes to change the interactive form field's parameters in a PDF document.

Use the PDF Document API to delete pages from a document.

Create a signature field and add it to a PDF document.

Import interactive form data from an XML file to a PDF document.

Retrieve a list of interactive form fields' names and use the PdfFormData object to fill form fields in code.