What PDF formats and versions are supported?

Our PDF authenticity checker supports most standard PDF formats including PDF 1.3 through PDF 2.0, linearized PDFs, PDF/A (archival format), and PDF/X (print format). While older versions (PDF 1.0-1.2) may work, analysis is most reliable with PDF 1.3 and newer.

The PDF verification system can analyze PDFs created by any standard PDF creation tool including Adobe Acrobat, Microsoft Office, Google Docs, LibreOffice, online PDF converters, and specialized PDF software.

Some limitations apply: password-protected or encrypted PDFs cannot be analyzed, corrupted PDFs may fail to process, and non-standard PDF variants might produce unexpected results. Our PDF modification detection works best with standard, unencrypted PDF files following ISO 32000 specifications.