Small and dependency free Python package to infer file type and MIME type checking the magic numbers signature of a file or buffer.

This is a Python port from filetype Go package.

• Simple and friendly API
• Supports a wide range of file types
• Provides file extension and MIME type inference
• File discovery by extension or MIME type
• File discovery by kind (image, video, audio…)
• Pluggable: add new custom type matchers
• Fast, even processing large files
• Only first 261 bytes representing the max file header is required, so you can just pass a list of bytes
• Dependency free (just Python code, no C extensions, no libmagic bindings)
• Cross-platform file recognition

pip install filetype

See annotated API reference.

import filetype

def main():
    kind = filetype.guess('tests/fixtures/sample.jpg')
    if kind is None:
        print('Cannot guess file type!')
        return

    print('File extension: %s' % kind.extension)
    print('File MIME type: %s' % kind.mime)

if __name__ == '__main__':
    main()

• dwg - image/vnd.dwg
• xcf - image/x-xcf
• jpg - image/jpeg
• jpx - image/jpx
• png - image/png
• apng - image/apng
• gif - image/gif
• webp - image/webp
• cr2 - image/x-canon-cr2
• tif - image/tiff
• bmp - image/bmp
• jxr - image/vnd.ms-photo
• psd - image/vnd.adobe.photoshop
• ico - image/x-icon
• heic - image/heic

• 3gp - video/3gpp
• mp4 - video/mp4
• m4v - video/x-m4v
• mkv - video/x-matroska
• webm - video/webm
• mov - video/quicktime
• avi - video/x-msvideo
• wmv - video/x-ms-wmv
• mpg - video/mpeg
• flv - video/x-flv

• aac - audio/aac
• mid - audio/midi
• mp3 - audio/mpeg
• m4a - audio/mp4
• ogg - audio/ogg
• flac - audio/x-flac
• wav - audio/x-wav
• amr - audio/amr
• aiff - audio/x-aiff

• br - application/x-brotli
• rpm - application/x-rpm
• dcm - application/dicom
• epub - application/epub+zip
• zip - application/zip
• tar - application/x-tar
• rar - application/x-rar-compressed
• gz - application/gzip
• bz2 - application/x-bzip2
• 7z - application/x-7z-compressed
• xz - application/x-xz
• pdf - application/pdf
• exe - application/x-msdownload
• swf - application/x-shockwave-flash
• rtf - application/rtf
• eot - application/octet-stream
• ps - application/postscript
• sqlite - application/x-sqlite3
• nes - application/x-nintendo-nes-rom
• crx - application/x-google-chrome-extension
• cab - application/vnd.ms-cab-compressed
• deb - application/x-deb
• ar - application/x-unix-archive
• Z - application/x-compress
• lzo - application/x-lzop
• lz - application/x-lzip
• lz4 - application/x-lz4
• zstd - application/zstd

• woff - application/font-woff
• woff2 - application/font-woff
• ttf - application/font-sfnt
• otf - application/font-sfnt

• wasm - application/wasm