veraPDF Online Checker and API

PDF Accessibility Validator

Validate PDF against PDF/UA-1 and WCAG 2.2 profile in a single request.

Direct API Calls

Endpoint:

POST /validate (base64 upload)


            

            

              

                
GET /validate (pdf_url query)

                
              

              

            

          

        

      


      

        Why VeraPDF?
        

          

            VeraPDF is an industry-standard, open-source validator supported by the Open Preservation Foundation and the PDF
            Association. In published validator comparisons, VeraPDF is often the strictest checker. It can surface PDF/UA issues
            that PAC, Adobe Acrobat, and CommonLook may miss, which is why this API uses VeraPDF as its baseline engine for
            technical accessibility validation.
          

        

      


      

        Privacy Policy
        

          

            No files, URLs, request payloads, or validation results are intentionally stored by this application or API beyond
            transient processing needed to complete a request.
          

          

            Submitted files are processed by AWS Lambda execution environments using ephemeral storage and are discarded
            after execution, subject to AWS platform behavior.