pypdf vs QuestPDF
PDF libraries for Python and C# compared
pypdf is a Python library for reading and manipulating existing PDFs, while QuestPDF is a C# library for generating structured documents. Their main difference is whether you need PDF operations in a Python workflow or code-driven document creation in .NET.
pypdf: Read and Manipulate PDF Files in Python
pypdf is a pure-Python library for reading PDFs and changing their pages or document data. It suits Python developers who need PDF operations inside scripts or applications without relying on a separate command-line tool.
QuestPDF: Generate PDFs with Fluent C#
QuestPDF is a production-ready C# library for generating PDFs with a fluent, component-based API. It helps .NET developers build maintainable reports, invoices, and other paginated documents without converting HTML to PDF.
| pypdf | QuestPDF | |
|---|---|---|
| Language | Python | C# |
| License | NOASSERTION | — |
| Stars | 10.2k | 14.2k |
| Forks | 1.6k | 772 |
| Last analyzed | Oct 3, 2026 | Oct 22, 2026 |
Key differences
- pypdf focuses on reading PDFs, extracting text and metadata, and changing pages or document data; QuestPDF focuses on composing and generating documents.
- pypdf is written for Python scripts and applications; QuestPDF uses a fluent, component-based C# API for .NET.
- pypdf includes splitting, merging, cropping, transforming, and annotating PDFs; QuestPDF provides layout composition, pagination controls, and operations such as merging and extracting pages.
- pypdf supports encryption and decryption, with an optional crypto dependency for AES; QuestPDF lists encryption among its PDF operations.
- pypdf links to pdfly as a separate command-line application; QuestPDF offers a companion app for document preview and layout debugging.
- Both repositories report a NOASSERTION license field; QuestPDF also describes a community and commercial licensing model, while pypdf advises checking the repository for licensing details.
Choose pypdf if you…
- need to read PDF text or metadata in Python workflows.
- want to split, merge, transform, or annotate PDFs from Python code.
- need encryption or decryption in a Python PDF library, and can install optional crypto dependencies for AES support.
Choose QuestPDF if you…
- want to generate structured PDFs from C# or .NET applications.
- need reusable layouts, data-driven content, and controlled pagination for reports or invoices.
- want multilingual or right-to-left layouts, or the companion app for preview and layout debugging.
Compare the numbers side by side, or add more projects
This comparison is generated with AI from the OSRepos analyses of both projects. Always check each project's repository and documentation before choosing.