Aspose.PDF

Aspose.PDF FOSS for .NET is a free, MIT-licensed .NET library for reading, creating, and manipulating PDF documents. Released under a permissive open-source license, it removes the traditional barrier to enterprise-grade PDF capabilities — every feature in the library is available without purchasing a commercial license. What Is Aspose.PDF FOSS for .NET? The library targets .NET 8 and later. It is published to NuGet under the package ID Aspose.Pdf.Foss and can be added to any .NET 8+ project with a single command: ...

Core PDF document management covers the operations that appear in nearly every PDF workflow: opening or creating a document, accessing pages and their content, reading and writing annotations, extracting text, and working with interactive actions. Aspose.PDF FOSS for .NET provides a .NET 8+ API that handles all of these tasks through a consistent object model centered on the Document and Page types. Document Lifecycle: Create, Open, Save Every workflow starts with either creating a new document or loading an existing one. Document.Create() returns a new, empty Document instance. Document.Open(data) accepts a byte[] or Stream and parses the PDF structure: ...

Aspose.PDF FOSS for .NET ships with a rich set of annotation and form-field APIs that let you mark up, link, and interact with PDF documents entirely in managed code — no license key required. Annotations at a glance The library’s AnnotationCollection class provides typed helper methods for every standard PDF annotation. Adding a sticky note is a single call: page.Annotations.AddTextAnnotation( new Rectangle(72, 720, 200, 740), contents: "Review needed", title: "Editor", open: true); Link annotations combine a clickable rectangle with a PdfAction: ...

The Document class is the heart of Aspose.PDF FOSS for .NET. It represents a complete PDF and provides access to every structure inside — pages, annotations, form fields, metadata, and embedded files. Opening documents Load a PDF from a file, a byte array, or a stream: using var doc = Document.Open(File.ReadAllBytes("input.pdf")); Console.WriteLine($"Pages: {doc.Pages.Count}"); Pages use 1-based indexing: doc.Pages[1] is the first page. Creating from scratch using var doc = new Document(); var page = doc.Pages.Add(); page.Paragraphs.Add(new TextFragment("Hello, PDF!")); doc.Save("hello.pdf"); Tables, floating boxes, headers/footers, and graphs are all paragraph types that the layout engine places automatically. ...

Aspose.PDF FOSS for Java provides a Java-native API for PDF document creation, annotation management, interactive form fields, page manipulation, PDF/A compliance validation, and AES-CBC encryption — MIT licensed, no proprietary dependencies.

PdfFileEditor, ContentsResizeParameters, and PdfPageEditor provide the core PDF document manipulation capabilities in Aspose.PDF FOSS for Java — all MIT-licensed and dependency-free.

The facades layer in Aspose.PDF FOSS for Java provides lightweight, task-focused APIs for annotation management, bookmark editing, document security, stamping, and content extraction — all without requiring direct manipulation of the PDF object model.

Aspose.PDF FOSS for Go provides a Go-native API for PDF document creation, editing, splitting, merging, encryption, AcroForm filling, table layout, bookmarks, and annotations — MIT licensed with no native dependencies.

Covers the Document, Page, PageRange, and DocumentInfo API in Aspose.PDF FOSS for Go — open, create, save, split, merge, extract page ranges, and edit Info dictionary metadata without native dependencies.