Converting a file to PDF/A compliant version

PDF/A is an ISO-standardized version of the Portable Document Format (PDF) specialized for use in the archiving and long-term preservation of electronic documents.

Instructions: https://aaltodoc.aalto.fi/doc_public/ohjeet/aaltodoc_pdf_a.pdf

PDF/A validation is done here: pdf-online.com

We recommend to use PDF-XChange printing. Choose PDF/A format and PDF/A-2b.

If your pdf is in right format, result should look like this:

File filename.pdf
Compliance pdfa-1a
Result Document validated successfully.