PDF Association publishes Brotli compression specification for PDF

The PDF Association has published an industry specification for Brotli compression in PDF, aiming to improve lossless compression across the document ecosystem. The new filter is designed to offer better compression, open interoperability and easier adoption for PDF tools and developers.

Why it matters: - Brotli gives the PDF ecosystem a new lossless compression option that can reduce file size more effectively than older filters like Flate and LZW. - The specification is open and license-free, which lowers barriers for vendors, developers and open-source projects. - Better compression can improve storage efficiency and speed up delivery of PDF files across platforms.

What happened: - The PDF Association announced the publication of the industry specification for Brotli compression in PDF. - The specification introduces a new BrotliDecode filter for use in PDF technologies. - PDF developers selected Brotli as the new standard for lossless compression in PDF.

The details: - Brotli is described as offering significantly better compression for a wide variety of PDF content than traditional filters. - Brotli is a well-standardized, patent-free and open specification. - The compression method is designed for performance with reasonable resource requirements for both creation and consumption. - Several members and open-source implementations, including Google pdfium and Mozilla's pdf.js, already support Brotli. - The PDF Association is encouraging developers, vendors and the wider PDF community to adopt the specification and implement Brotli in PDF solutions. - More information is available in the benefits overview. - The specification can be downloaded from the PDF Association's Brotli compression in PDF page.

Between the lines: - The announcement signals a push to modernize PDF compression around an open standard rather than proprietary or older legacy methods. - Support from widely used open-source tools could accelerate implementation across the broader PDF market. - The move may make Brotli easier to evaluate and deploy for organizations that already use standards-based PDF tooling.

What's next: - Developers and vendors are expected to begin implementing the BrotliDecode filter in PDF products. - Wider adoption will depend on how quickly the PDF ecosystem updates libraries, viewers and creation tools. - The PDF Association is likely to use the new specification to drive broader community uptake of Brotli compression.