PDF to PDF/A Converter

What is PDFTron PDF SDK?

PDFTron is a software development kit (SDK) that can be used to rapidly embed PDF functionality into any application or workflow. Choose from 100+ features, such as viewing, annotation, and more.

PDF/A Library

Easily integrate our PDF/A technology into your application or workflow to add functionality for converting 20+ file formats to ISO-compliant PDF/A files that pass veraPDF validation. Learn More

VeraPDF-Tested

PDF/A files created with our free online tool are ISO-compliant and pass VeraPDF validation. VeraPDF is an open source PDF/A validator supported by the PDF industry and led by the Open Preservation Foundation.

20+ Supported File Formats

Subtypes and Conformance Levels

Getting a typical PDF file to conform to PDF/A-1 usually requires the most changes. With PDF/A-2, in contrast, you will need to make fewer changes and you will get smaller files. PDF/A-3 is essentially the same as PDF/A-2, but it allows for the embedding of non-PDF/A files.

As for conformance level, Level A is often not practical because of missing Unicode orsemantic information in the source. Level B it is the easiest conformance level to target while ensuring reliable rendering. Level U ensures that all text has Unicode equivalents. Learn More

Code Samples For Our PDF/A Library

See how to validate existing PDF documents for PDF/A compliance or convert 20+ file formats into PDF/A files.
C# C# (.NET Core) JS (Node.js) C# (Xamarin) C++ Java Java (Android) Kotlin Obj-C PHP Python Ruby Swift VB Go

You can also convert files and repositories through an easy-to-use command-line tool (Windows, Linux, macOS).