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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.


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 three ISO standards (PDF/A-1, PDF/A-2, PDF/A-3), and cover all conformance levels (A, B, U).

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.
See documentation

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.
C# C# (.NET Core) C# (Xamarin) C++ Java Java (Android) Kotlin Obj-C PHP Python Ruby Swift VB

Automate Archiving Workflows

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, being 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

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 the need for specialist software.

Detailed Reporting

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

Try our SDK for free today


Free Trial

Get unlimited trial usage of PDFTron SDK to bring accurate, reliable, and fast document processing capabilities to any application or workflow.

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