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PDF/A Library

Cross-platform PDF/A SDK for converting 20+ file formats into ISO-compliant PDF/A files that pass VeraPDF validation.

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The world’s most VeraPDF compatible PDF/A converter. VeraPDF is an open source PDF/A validator supported by the PDF industry and funded by the EU’s PREFORMA project.


PDF/A files generated with our PDF/A SDK are compliant with the ISO standards (PDF/A-1, PDF/A-2, PDF/A-3 and PDF/A-4), and cover all conformance levels (A, B, U, E).

Convert From 20+ Formats

Convert into VeraPDF-valid ISO-compliant PDF/A files from 20+ file formats, including PDF, JPG, HTML, Word, and TIFF. Or, repair non-compliant PDF/A documents.

See Documentation

Batch Convert PDF to PDF/A

Supports high volume PDF to PDF/A batch conversion from the command-line, or as a development library integrated into a document workflow automation.

Linux, Windows, and More

Convert from PDF to PDF/A on Linux (including Ubuntu), Windows, iOS, Android, Mac, Web, Xamarin, and UWP with your preferred programming language.

Code Samples

See how to validate or convert to PDF/A.

View Code Samples

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ZUGFeRD Invoices

Insert structured and searchable XML metadata into PDF/A files to create VeraPDF-valid ZUGFeRD electronic invoices.

Regulatory Compliance

PDF/A is now the global standard for digital archiving, recommended by the UK, US, Germany, Australia, and many other countries.

Digital Signatures

Reliably preserve digital signatures by embedding them in PDF/A files, ensuring long-term document integrity and authenticity.

Reduce Preservation Risk
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Minimal Information Loss

PDF features not suitable for archiving, such as encryption, missing fonts, or device-dependent color, are replaced with compliant equivalents.

Consistent, Universal Viewing

Reliably render documents on today's operating systems, and on those far into the future, without special software.

Detailed Reporting

Track all changes for automatic assessment of data loss, while producing a detailed report of relevant error objects.


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Client-Side Processes

Scale easily without any server-side dependencies like Microsoft Office or LibreOffice for rendering, conversion, or editing PDFs, Microsoft Office, images, videos, and HTML.

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Unparalleled Rendering Quality

Bring fast rendering and leading accuracy conversion of Office documents to any web, mobile, or desktop application.

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Secure By Design

No outside dependencies means you can deploy on your own infrastructure without data ever leaving your platform to eliminate vulnerabilities.

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Expert and Reliable Support

Accelerate projects with our team of experienced SDK developers there to support you through your unlimited trial to the finish line and beyond.

Time to make work better and life simpler.