Shared Brotli Compressed Data Format
RFC 9841, “Shared Brotli Compressed Data Format”, is an Informational document published in September 2025 by J. Alakuijala, T. Duong, E. Kliuchnikov, Z. Szabadka, L. Vandevenne. It updates RFC 7932. The canonical text is published by the RFC Editor.
Abstract
This specification defines a data format for shared brotli compression, which adds support for shared dictionaries, large window, and a container format to brotli (RFC 7932). Shared dictionaries and large window support allow significant compression gains compared to regular brotli. This document specifies an extension to the method defined in RFC 7932.
What “Informational” means
Published for the general information of the community. It does not define an IETF standard and carries no standards-track status.
The canonical text of RFC 9841 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
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