This is a database of all mime types. It consists of a single, public JSON file and does not include any logic, allowing it to remain as un-opinionated as possible with an API. It aggregates data from the following sources:
npm install mime-db
The JSON file is a map lookup for lowercased mime types. Each mime type has the following properties:
.source- where the mime type is defined. If not set, it's probably a custom media type.
.extensions- known extensions associated with this mime type.
.compressible- whether a file of this type can be gzipped.
.charset- the default charset associated with this type, if any.
If unknown, every property could be
To edit the database, only make PRs against
To update the build, run
npm run build.
Adding Custom Media Types
The best way to get new media types included in this library is to register them with the IANA. The community registration procedure is outlined in RFC 6838 section 5. Types registered with the IANA are automatically pulled into this library.