Convert PDF documents to PDF/A for archiving and long-term preservation.

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PDF/A is an ISO standard version of Portable Document Format (PDF) designed specifically for archiving and long-term preservation of electronic documents.

ISO 19005-2:2011 | PDF 1.7 (ISO 32000-1:2008)

How to convert PDF to PDF/A

  1. Click the Select a file button
    Drag and upload your PDF file to this page.
  2. Options
    Choose your preferred PDF/A standard: PDF/A-1b, PDF/A-2b or PDF/A-3b
  3. Please wait a moment
    Please wait while the conversion to PDF/A is in progress.
  4. Click the download button
    Click the download button to save the converted PDF/A format file.

More about PDF/A Converter


Long-term storage

PDF/A is designed for reliable, long-term archiving of digital documents containing text files, images, vector graphics, and metadata. This standard format not only allows documents to be archived, but also retains their visual appearance and formatting over the years. Save your important documents by converting them to PDF/A format today.


ISO 19005

Our PDF/A converter supports the most common PDF/A-1b, PDF/A-2b and PDF/A-3b conformance levels of the PDF/A format specified in the ISO 19005 series of standards. Additionally, PDF/A-1a, PDF/A-2a, PDF/A-2u, PDF/A-3a, and PDF/A-3u formats are supported. Convert PDF files to the desired PDF/A-level format for long-term archive documents.

Simple and easy to use

Simple and easy to use

Our PDF/A converter is designed to be simple and easy to use, so that even first-time users can start using it right away. Upload your PDF files in a few clicks and convert them to your preferred PDF/A-level format. Now convert PDF files to PDF/A format online and download for free.

Safe online conversion

Safe Online PDF Software

Our service prioritizes the privacy of our users. Therefore, it is designed not to monitor users' files or leave backups, shares and user logs. All file uploads from users are encrypted and sent to our servers via HTTPS. Moreover, it uses 256-bit encryption technology to protect all your information and data, so you don't have to worry about security while using online tools.

Automatic Deletion

Automatic deletion

After you have finished working with your digital documents using our online PDF tools, you can download the files from our servers and manually delete them yourself. Don't worry if you forget to delete a file. To protect user data, all files on the server are designed to be permanently deleted after 30 minutes. No one can access your files and your privacy is 100% secure.

Processing in the cloud

Process in the cloud

All PDF processing is done completely in the cloud, so it does not consume any resources on your computer. You can use all PDF tools for free through your web browser anywhere you have an internet connection. You no longer need to install or update software to work with digital documents.

Did you know?

What is PDF/A?

PDF/A is a PDF format that imposes certain restrictions on the essential parts of digital documents, including text, images, vector graphics, and related metadata, suitable for long-term storage. It is an ISO standard format and is now widely adopted in all industries. This PDF/A format guarantees that you can open your document, no matter what software you use, because essentially all the information needed to display the document and its elements in the same way is included in the file. In the digital age, it's important to have a reliable and secure format for storing and sharing electronic documents. PDF/A was created to meet this need, providing a standardized format for long-term storage and accessibility of digital documents. Whether you work in government, finance, law, or other industries, PDF/A is an important tool for preserving important digital documents for the future. There are many different types of PDF/A. Each of them has different PDF/A standards and conformance levels.

Types of PDF/A


Ensures that text and other content on pages are uniformly readable and viewable by users on their computer screens. This Level B level provides minimal guarantees that the rendered visual appearance of the document will be preserved over the long term, but does not guarantee the quality of the text.


It is based on PDF 1.7 (ISO 32000-1) and guarantees that your document will render exactly as it did when it was first saved. It offers several new features, such as JPEG 2000 image compression, support for transparency and layers, and electronic signatures.


Like PDF/A-2, it is based on PDF 1.7 (ISO 32000-1). You can embed any document format in your PDF documents, such as Excel, Word, HTML, CAD or XML files.


Benefits of the PDF/A format

  1. The primary purpose of PDF/A is long-term archiving of digital documents. Today, libraries, banks, insurance companies, and all industries convert key documents to PDF/A for use.

  2. The PDF format is accessible on all platforms, and the PDF/A format has the same benefits. This means that you can perfectly read and use PDF/A documents whether your OS is Windows or Mac.

  3. In a digital environment, it is more important than in an analog environment that documents remain authentic, that they are not modified after they are created, and that documents with original content modified are not shared. The PDF/A format cannot fully guarantee the authenticity of a document, but it is difficult to modify and provides an electronic signature to help determine authenticity.

  4. Electronic documents can contain a lot of information as metadata, such as the author's name and the date of the file. Therefore, it is important to be able to save and add this metadata when converting the original electronic document to another file. PDF/A was specifically designed to fully support metadata.

  5. The PDF format has been around since 1991, so the format isn't going away any time soon. Therefore, PDF/A will remain easy to read and use as long as PDF exists.


FAQs about the PDF/A conversion tool

Are my files protected while using online tools?

We take the privacy of our users first. Therefore, it is designed not to monitor users' files or leave backups, shares and user logs. Additionally, all user file uploads are sent encrypted via HTTPS to our servers and are designed to be automatically deleted.

How to change PDF to PDF/A for free?

Onlinepdfconverter.com offers a free online PDF converter to convert PDF to PDF/A format. After uploading the PDF file to be converted, you can select the desired PDF/A format and convert it.

How is PDF/A different from PDF?

PDF/A is a PDF format that imposes certain restrictions on the essential parts of a document for archiving it. PDF/A disallows audio, video, and executable content, but allows PDF documents. PDF/A requires that the file contain the graphics and fonts that make up the content, but PDF does not. PDF/A does not allow encryption of document files.

Are PDF/A conversion tools available for Mac, Linux or Smartphone?

Yes. You can use the PDF/A conversion service on any machine with a web browser that can access the Internet.