Tim81 

Clean-room .NET PDF generation kernel: low-level object model, document structure, content streams, fonts, and images. Implemented solely from the ISO 32000 standard. Zero runtime dependencies.

High-level document and layout engine for VellumPdf: paragraphs, lists, tables, images, automatic pagination, and tagged-content support. Implemented solely from the ISO 32000 standard.

Optional metric-compatible, embeddable substitutes for the PDF standard-14 fonts, so VellumPdf can produce conformant (fully embedded) PDF/A text without a caller-supplied font program. Bundles the Liberation... More information

Optional digital-signature add-on for VellumPdf: PAdES/PKCS#7 detached CMS signatures over VellumPdf.Kernel.PdfDocument and VellumPdf.Layout.Document. References System.Security.Cryptography.Pkcs; keeps the... More information

PDF reader for VellumPdf: opens an existing PDF (classic cross-reference tables, cross-reference and object streams, hybrid-reference files; unencrypted) and exposes its catalog, signatures, and decoded stream... More information

In-process PDF/A and PDF/UA preflight validation for VellumPdf: opens a PDF through VellumPdf.Reader and runs a registry of clean-room conformance rules authored from the ISO specifications, returning... More information

Optional barcode add-on for VellumPdf: QR (incl. GS1-mode QR and GS1 Digital Link), Micro QR, PDF417, Code 128 (incl. GS1-128), Code 39, EAN-13/EAN-8/UPC-A/UPC-E with EAN-2/EAN-5 add-ons, ITF-14, Data Matrix... More information

Native-AOT command-line preflight tool for VellumPdf: validates PDF files against PDF/A-2b/2u/2a and PDF/UA-1 conformance levels. Outputs text, JSON, or SARIF reports.