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Brotli compression coming to PDF

March 2025 by Peter Wyatt, Robin Watts

In October 2023, the PDF Association launched a public request for stakeholder feedback on aspects of PDF that could be usefully updated.

We explored various subjects at that event, including HDR, new color capabilities, new font technology, animation, accessibility, new 2D and 3D graphical formats, and improved compression methods. Although several of these are under active development today in the PDF Association’s Imaging Model TWG, this article deals with a new method for optimizing PDF file size.

Brotli, a compression algorithm developed by Google engineers, was originally intended for web use, and is broadly adopted in web browsers. When implemented in PDF Brotli compression can offer significant reductions in file-size. Learn more!

When will AI understand document semantics?

March 2025 by PDF Association staff
PDF in the Wild


When will AI understand document semantics? | Will LLM-based OCR live up to the challenge? | Indicating whether the publisher allows PDF files to be mined by AI | JHOVE … Read more

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March 2025 by Erin Dempsey (TWAIN Working Group)
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This article explores how ISVs can use PDF/R to improve imaging application software’s efficiency, reduce development complexity, and enhance customer … Read more

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March 2025 by PDF Association staff
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The PDF Association will host a trio of PDF technology events in Berlin from September 11-19. Save the date… and … Read more

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February 2025 by PDF Association staff
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The new TWG will explore topics such as verifiable credentials, digital signatures, modern cryptography and content provenance frameworks in alignment … Read more

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February 2025 by PDF Association staff
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These free XMP Extension Schema templates support PDF documents that conform to multiple subset standards, including PDF/A, PDF/X, PDF/VT, and … Read more

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February 2025 by Peter Wyatt
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Google’s Jpegli promises smaller JPEG images (and so, smaller PDF files) with no change to reader software! Check it out … Read more

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February 2025 by PDF Association
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PDF Week Boston 2025 is the first of two members-only events in 2025 focused on PDF technology specifications and standards … Read more

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February 2025 by PDF Association staff
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PDF bookmarks from Google Chrome? | What does “PDF” mean to you? | Two reasons why everyone needs PDF | … Read more

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February 2025 by PDF Association staff
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Organizations worldwide rely on email at almost every level of daily operations, but lack options for effectively preserving and accessing … Read more

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January 2025 by Peter Wyatt
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What’s the smallest possible fully compliant and validatable PDF file? We set out to answer the question.

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January 2025 by PDF Association staff
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Doom in a PDF | PDF Week Boston 2025 | The EAA is coming! | AI and accessibility standards | … Read more

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