---
title: "PDF/A converter: ISO compliant and veraPDF valid"
canonical_url: "https://www.nutrient.io/guides/dotnet/pdfa/"
md_url: "https://www.nutrient.io/guides/dotnet/pdfa.md"
last_updated: "2026-05-21T17:12:02.215Z"
description: "Learn about the C# PDF/A converter library within Nutrient .NET SDK. Convert documents to the PDF/A standard for long-term archiving and preservation."
---

# C# PDF/A converter library

Convert 100+ file formats into ISO-compliant PDF/A files that pass the veraPDF validator and the Adobe Acrobat Preflight tool. Our converter library supports converting to any PDF/A substandard (PDF/A-1 to PDF/A-4) in your C# application. It includes PDF/A validation to automatically determine conformance of your PDF/A files by analyzing PDF structure; lexical, syntactic, and semantic levels; and metadata, fonts, color space, and other properties. Explore our guides and code samples to learn how you can integrate our PDF/A conversion technology into your application or workflow.

## Key capabilities

- **ISO compliant** — Passes the veraPDF validator and Adobe Acrobat Preflight tool

- **100+ file types** — Convert PDFs, images, MS Office files, and more into PDF/A

- **All PDF/A substandards** — Supports converting to all conformance levels (PDF/A-1 to PDF/A-4)

- **PDF/A validation** — Determines PDF/A conformance by analyzing PDF structure; lexical, syntactic, and semantic levels; and metadata, fonts, color space, and other properties

- **Searchable** — Convert documents to fully searchable PDF/A files

- **Compression** — Reduce storage by combining valid PDF/A conversions with compression technology

## Guides for PDF/A

**[Convert to PDF/A](https://www.nutrient.io/guides/dotnet/pdfa/convert.md)**

Learn how to convert files to ISO-compliant PDF/A

**[Validate PDF/A](https://www.nutrient.io/guides/dotnet/pdfa/validate.md)**

Learn how to validate ISO-compliant PDF/A documents
---

## Related pages

- [Convert PDF to PDF/A documents in C#](/guides/dotnet/pdfa/convert.md)
- [Validate PDF/A in C#](/guides/dotnet/pdfa/validate.md)