Tiny library to detect mime types in files.

Upstream URL


Yukari Hafner <>


Yukari Hafner <>



About Trivial-Mimes

This is a teensy library that provides some functions to determine the mime-type of a file. As I've had a need for this kind of functionality more than once now and haven't found any suitably lightweight alternative I quickly whipped this up.

How To

(mimes:mime #p"~/something.png")

Upon loading, trivial-mimes builds a mime-type database from the local mime.types file or a copy thereof from its own source directory. This database is a simple association of file extension to mime-type (see mime-lookup). If the mime lookup in the database fails, it will instead try to consult the file shell utility on unix systems (see mime-probe). If that too doesn't work, it falls back onto a default.

Dependencies (0)

    Dependents (14)

    • clack-static-asset-middleware
    • cl-markless
    • clohost
    • common-lisp-jupyter
    • dexador
    • humbler
    • lack
    • lass
    • lichat-serverlib
    • lichat-tcp-client
    • mito-attachment
    • multiposter
    • reblocks-file-server
    • woo
    • GitHub
    • Quicklisp