PDFio is a simple C library for reading and writing PDF files.

Use the Office File API to create thumbnail images for Excel, Word and PDF documents.

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.

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

Implement a PDF viewer in an ASP.NET MVC web application.

Customize print output and specify settings for a specific document page.

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

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

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

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

Implement a PDF viewer in an ASP.NET web application.

A pdf document toolkit which splits, extracts and merges specified pdf files. Deployed with Flask and accessible via Web UI.

Use the PDF Document API to apply multiple PKCS#7 signatures with X.509 certificates.

Use the PdfDocumentProcessor to add a visual signature to a document.

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

Access and modify custom document properties.

Use the PDF Document API to create a document with graphics in code.

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

This free consulting project uses Aspose.PDF for .NET and allows you to encrypt/decrypt a PDF document by applying a password and setting different privileges to it. It is also a representation of API usage under .NET Core Framework.