Every media type, straight from the registry.

Drop a file to identify it by its bytes — or browse 2,512 registered types with their defining specs.

The registry, by category

Relic of the day

The compact cassette1963–2000s

Forty-five minutes a side. The mixtape was a playlist you had to commit to in advance.

Its heirs: audio/* · the full museum

The ones you're probably after

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