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What Is PDF/E? Definition, ISO 24517, Uses, and How to Create or Open One
Learn what PDF/E is, how ISO 24517 defines it, where it is used, how it differs from a regular PDF, and how to create or open a PDF/E file.
What Is PDF/UA? Definition, Tagged PDFs, Requirements, WCAG, and How to Check Compliance
Learn what PDF/UA is, how tagged PDFs improve accessibility, PDF/UA requirements, WCAG differences, compliance checks, and how to create accessible PDFs.
What Is PDF/X? Definition, Requirements, Subtypes, Who Uses It, and How to Export One
Learn what PDF/X is, its print requirements, PDF/X-1a, X-3, X-4 and X-6 subtypes, key benefits, and how to export a print-ready PDF/X file.
PDF 1.7 vs PDF 2.0: What's New in the Latest Version
PDF 1.7 vs PDF 2.0 compared in plain English: what changed in security, accessibility, print production, and forms, plus whether you need to upgrade.
ISO 32000: The PDF Specification, Its Parts, Editions, and How to Get It Free
Learn what ISO 32000 is, how PDF 1.7 and PDF 2.0 map to its parts, who maintains the standard, and where to get ISO 32000-2 free.
PDF/A vs PDF/X vs PDF/UA: What's the Difference and Which to Use
Compare PDF/A vs PDF/X vs PDF/UA to learn their differences, key requirements, restrictions, best uses, and which PDF standard you should choose.
What Is PDF/A? Self-Contained Archiving, Embedded Fonts, Conformance Levels, and Why Governments Require It
What PDF/A is - a self-contained format for long-term archiving: embedded fonts, conformance levels, versions, and why governments require it.
PDF Standards Explained: PDF/A, PDF/X, PDF/UA, PDF/E, PDF/VT and GeoPDF
Learn PDF standards including PDF/A, PDF/X, PDF/UA, PDF/E, PDF/VT, and GeoPDF, what each is for, how to validate them, and which one to use.
The People Behind the PDF: Warnock, Geschke, and the Team Who Built Acrobat
The people behind the PDF - how John Warnock and Charles Geschke founded Adobe, built Acrobat, and turned PostScript into the PDF.
PDF Version History: Every Release from PDF 1.0 to PDF 2.0 (and Their Acrobat Versions)
PDF version history from 1.0 to 2.0 - every release, its Acrobat version, and the one feature it added, plus how to read a file's %PDF- version yourself.