woff2 を Homebrew, apk, apt, dnf, MacPorts, Nix, pacman, zypper でインストール

プロジェクトリンク

• ホームページ
• 上流ドキュメント
• パッケージマネージャページ

コマンドとエイリアス

• woff2_compress
• woff2_decompress
• woff2_info

プロジェクトの歴史

The W3C publication history records WOFF2's First Public Working Draft on 8 May 2014, Working Draft in 2015, Candidate Recommendation Snapshot in 2016, Proposed Recommendation in January 2018, and Recommendation on 1 March 2018, with later Recommendation updates in 2021, 2022, and 2024. The current W3C Recommendation says WOFF2 was developed from experience with widely deployed WOFF 1.0 and was designed to reduce network bandwidth while keeping decompression fast enough for mobile devices.

Google's woff2 repository was created in October 2014 and provides the font compression reference code. Its README separates the Brotli reference code from the C++ font compression and decompression code, and the repository's releases show 1.0.0 and 1.0.1 in October 2017 followed by 1.0.2 in November 2017, just before the format reached W3C Recommendation status.

採用の歴史

WOFF2 moved from an optimization experiment into the default web-font format because it could be deployed alongside WOFF 1.0 in normal CSS. The W3C Evaluation Report explained that @font-face can list WOFF2 first and WOFF as a fallback without user-agent sniffing, and the current Recommendation states that WOFF2 is implemented in all major browsers and widely used on production websites.

The format's adoption was tied to measurable compression gains. The W3C Evaluation Report found Brotli-based WOFF2 had median gains of about 23.94% over WOFF1 on the Google Fonts TrueType corpus and 26.79% on an Adobe TrueType corpus, while keeping memory and decompression cost within the constraints needed for web deployment.

使われ方

Package users normally run woff2_compress to convert TTF or OTF fonts into .woff2 files, woff2_decompress to round-trip them back to OpenType/SFNT data, and woff2_info to inspect the package. Web developers then reference .woff2 files from CSS @font-face rules, often with older formats as fallbacks only when legacy browser support is required.

パッケージ好きにとっての重要性

The package is important because it gives distributions a small, standalone implementation of a core web platform format. It is used by font build pipelines, web asset optimizers, browser tests, and packaging workflows that need reproducible conversion between OpenType fonts and the compressed format browsers actually fetch.

タイムライン

• 2014: WOFF2 First Public Working Draft published by W3C and Google's woff2 repository created.
• 2016: WOFF 2.0 Evaluation Report published as a W3C Working Group Note, comparing compression candidates and deployment constraints.
• 2017: Google woff2 1.0.x releases published.
• 2018: WOFF2 became a W3C Recommendation.
• 2024: W3C published an updated WOFF2 Recommendation and implementation report material.

Related projects

• WOFF 1.0 is WOFF2's predecessor and remains the fallback format in many historical CSS examples.
• Brotli is the entropy-coding layer used by WOFF2; the W3C Recommendation records Google's royalty-free licensing commitment for Brotli use in the specification.
• FontTools implements WOFF2 support in Python and is listed in the W3C implementation report alongside Google's C++ woff2 implementation.

ソース

• https://api.github.com/repos/google/woff2
• https://api.github.com/repos/google/woff2/releases?per_page=100
• https://github.com/google/woff2
• https://w3c.github.io/woff/woff2/ImpRpt/
• https://www.w3.org/Fonts/WG/WOFF2ER/
• https://www.w3.org/TR/WOFF2/
• https://www.w3.org/standards/history/WOFF2/