openfontlicense.org

What It Is

openfontlicense.org is the official website for the SIL Open Font License (OFL), providing the official license text and FAQ for the current OFL 1.1 version. It is not a font editor or asset marketplace, but an open licensing framework for font software. Its audience includes type designers, design teams, publishers, web and app developers, open-source distribution maintainers, and others.

Core Concept and Licensing

The core value of the OFL is that it allows fonts to be widely used, embedded, bundled, modified, and redistributed. The text makes clear that OFL fonts can be used in design outputs such as books, posters, logos, websites, video titles, T-shirts, 3D-printed objects, and more, without requiring additional permission or mandatory attribution. Graphics, documents, or physical objects created using the font are not subject to OFL copyleft restrictions; their copyright remains with the creator of those works.

For modification and distribution, the OFL places more emphasis on compliance boundaries: the font author retains copyright; derivative fonts must continue to use the OFL; copyright and license information must not be removed; and if the original font declares Reserved Font Names (RFN), modified versions generally need to use a different font name. For web fonts, WOFF/WOFF2 compression may not count as modification if the original data and metadata remain unchanged, but subsetting, optimization, EOT conversion, and similar format changes are often considered modifications and must follow requirements such as renaming.

Pricing and Commercial Use

The OFL itself is a free and open license. It allows fonts to be packaged into software, apps, Linux/BSD distributions, CMS templates, web font services, and even commercial products for sale. The key restriction is that the font itself cannot be sold on its own; it must be part of a larger software package, service, subscription, or bundle. This makes it very suitable for open-source font distribution and commercial design use, but not for business models that rely on reselling standalone font files.

Pros, Cons, and Who It’s For

Its strengths are clear licensing, commercial friendliness, broad scenario coverage, and a balance between open collaboration and protecting the original author’s font names. The FAQ also addresses complex scenarios such as embedding, web fonts, DRM, and AI training/generation. The downside is that the rules are relatively lengthy, and concepts such as RFN, format conversion, subsetting, and functional equivalence can be somewhat challenging for users without a legal or font engineering background.

It is especially suitable for brand design, web design, app development, and open-source projects that need low-risk font usage. Type designers can also use it to publish their work while retaining attribution and name protection.

Access in China

The crawled text does not provide information on access, payment, or localization for mainland China, so its availability is unknown. If access is unstable, alternatives include OFL-licensed fonts on Google Fonts, open-source font project pages, or clearly open-licensed fonts provided by domestic font platforms. However, the license text should still be checked individually for each font.