---
title: "Convert PDF to PDF/A"
canonical_url: "https://www.nutrient.io/guides/dotnet/conversion/pdf-to-pdfa/"
md_url: "https://www.nutrient.io/guides/dotnet/conversion/pdf-to-pdfa.md"
last_updated: "2026-06-09T19:02:33.585Z"
description: "Convert PDF documents to PDF/A format using Nutrient .NET SDK."
---

# Convert PDF to PDF/A

PDF/A conversion prepares PDF documents for long-term archiving. It enforces preservation rules so documents remain readable and self-contained over time.

Use this workflow when you need to:

- Meet archival or retention requirements

- Preserve document rendering for long-term storage

- Remove external dependencies from PDF files

## Prepare the project

Register the SDK license before running conversion operations. For setup details, refer to the [getting started with.NET SDK](https://www.nutrient.io/sdk/dotnet/getting-started.md) guide.

```csharp

using GdPicture14;

LicenseManager licence = new LicenseManager();
licence.RegisterKEY(""); // Set your license key

```

## Load the PDF document

Create a `GdPicturePDF` instance and load the source file:

```csharp

using GdPicturePDF pdf = new GdPicturePDF();
pdf.LoadFromFile(@"input.pdf");

```

## Convert to PDF/A

Convert the loaded document to PDF/A-2b:

```csharp

pdf.ConvertToPDFA(@"output.pdf", PdfConversionConformance.PDF_A_2b, false, false);

```

This conversion writes a preservation-oriented output file with PDF/A conformance settings.

## PDF/A conformance levels

The SDK supports multiple conformance levels, including:

- PDF/A-1a

- PDF/A-1b

- PDF/A-2a

- PDF/A-2b

- PDF/A-3a

- PDF/A-3b

Select the level that matches your archival policy.

## Conversion behavior

During conversion, the SDK enforces requirements such as:

- Embedded fonts

- Compliant color spaces

- Archival metadata

- Embedded resource validation

- Structure adjustments for preservation

## Handle errors

In production, validate:

- Input file availability and format

- Operation status after loading and conversion

- Output conformance with your validation tools

For status-handling patterns, refer to the [handling errors with.NET SDK](https://www.nutrient.io/guides/dotnet/best-practices.md#error-handling) guide.

## Common use cases

PDF/A is common in:

- Legal archives

- Government records

- Medical retention workflows

- Financial record retention

- Research and publication archives

## Conclusion

This guide converts a standard PDF file to PDF/A for archiving and compliance-oriented document storage.
---

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