#content-type

The canonical MIME / media-type database (the jshttp mime-db used by Express and most of the Node ecosystem: IANA + Apache + nginx), served from memory — no key. Resolve a media type to its file extensions, charset and compressibility; reverse-lookup the media type(s) for a file extension (e.g. png → image/png); and search or list types by source. 2,600+ media types, 1,000+ with file extensions. Lean, predictable JSON. Ideal for upload validation, Content-Type resolution, file-type detection, download handlers and developer tooling.

api.oanor.com/mimetypes-api

A fast, fully-local MIME and file-type toolkit: look up the MIME type, charset and category for a filename or extension, list every file extension registered for a MIME type, and detect a file's real type from its leading magic bytes (over 40 signatures, including RIFF container disambiguation for WEBP, WAV and AVI), accepting hex or base64 input. Every endpoint accepts input via the query string or the request body. Pure server-side compute, no third-party upstream, so responses are instant and always available. Ideal for upload validation, security (verify a file's real type against its claimed extension), CDNs and content pipelines.

api.oanor.com/mime-api