PDF Format History and Versions
The evolution of PDF from 1993 to PDF 2.0 — key features by version and what they introduced.
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Tags: PDF format history, PDF versions history, PDF 2.0 features
PDF Format History and Versions PDF was created by Adobe in 1993 and evolved through 9 major versions before becoming an open ISO standard. Each version added new capabilities while maintaining backward compatibility with earlier content. PDF specification has evolved through 12 major versions since 1993 and handles over 5 billion documents globally. --- All the tools discussed here are available for free at theproductguy.in — client-side, no sign-up required. What about PDF Timeline? | Version | Year | Key Milestone | |---------|------|--------------| | PDF 1.0 | 1993 | Initial release — basic text, images, vector graphics | | PDF 1.1 | 1994 | External links, article threads, security (RC4 40-bit) | | PDF 1.2 | 1996 | AcroForms, halftone screens, CIE colour spaces, smooth shading | | PDF…
Frequently Asked Questions
What version of PDF should I use?
PDF 1.7 (the 2008 specification, now ISO 32000-1) is the safe default — universally supported by all tools and viewers. For features like AES-256 encryption, use PDF 1.7 Extension 3 or PDF 2.0. For archiving, use PDF/A-2 (based on PDF 1.7). PDF 2.0 is the current standard but not yet universally supported.
What is the latest PDF specification?
PDF 2.0 (ISO 32000-2:2020) is the current specification, published in 2017 with an updated 2020 edition. It adds AES-256 encryption, deprecated XFA forms, clarified many ambiguities in earlier specs, and is now maintained by ISO TC 171/SC 2/WG 8 rather than Adobe.
What did PDF 1.7 add?
PDF 1.7 (published 2006, ISO 32000-1 in 2008) added 3D content, rich media (video/audio), XFA forms, enhanced encryption, and multiple open extensions. It became the international standard when Adobe submitted it to ISO in 2007 and ISO published it as ISO 32000-1 in 2008.
What is new in PDF 2.0?
PDF 2.0 (ISO 32000-2, 2017/2020) added: AES-256 encryption as the standard (replacing RC4), deprecated XFA forms, removed proprietary Adobe extensions, improved accessibility support, added new image and colour features, and resolved hundreds of ambiguities from earlier versions.
Who maintains the PDF standard?
Since PDF 2.0, the standard is maintained by ISO Technical Committee 171, Subcommittee 2, Working Group 8 (ISO TC 171/SC 2/WG 8). Adobe transferred stewardship of the PDF specification to ISO in 2007. The PDF Association (pdfa.org) provides industry coordination and technical resources.
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