fileinfo(...)

Detect file mime, type, and get suggested extension.

• Works in the browser or NodeJS
• Accepts input of types: Base64 | File | Blob | String

Install

npm install fileinfo

Usage

const fileinfo = require('fileinfo')
 
fileinfo(input).then({mime, type, extension} => {
 
})
 
/* Detect whether an input is of a specific type */
fileinfo.is(input, targetType).then(truthy => {
  
})

Detects the following

{
    /* text */
    json: {mime: 'application/json', type: 'text'},
    txt: {mime: 'text/plain', type: 'text'},

    /* image */
    bmp: {mime: 'image/bmp', type: 'image'},
    gif: {mime: 'image/gif', type: 'image'},
    icns: {mime: 'image/icns', type: 'image'},
    ico: {mime: 'image/x-icon', type: 'image'},
    jpeg: {mime: 'image/jpg', type: 'image'},
    jpg: {mime: 'image/jpg', type: 'image'},
    png: {mime: 'image/png', type: 'image'},
    tiff: {mime: 'image/tiff', type: 'image'},
    webp: {mime: 'image/webp', type: 'image'},

    /* audio */
    aiff: {mime: 'audio/aiff', type: 'audio'},
    mid: {mime: 'audio/mid', type: 'audio'},
    mp3: {mime: 'audio/mpeg', type: 'audio'},
    ogg: {mime: 'audio/ogg', type: 'audio'},
    wav: {mime: 'audio/wav', type: 'audio'},

    /* video */
    mp4: {mime: 'video/mp4', type: 'video'},
    mpeg: {mime: 'video/mpeg', type: 'video'},
    webm: {mime: 'video/webm', type: 'video'},

    /* clipart */
    svg: {mime: 'image/svg+xml', type: 'clipart'},

    /* font */
    eot: {mime: 'application/vnd.ms-fontobject', type: 'font'}, // http://en.wikipedia.org/wiki/Embedded_OpenType
    otf: {mime: 'application/font-sfnt', type: 'font'},
    ttf: {mime: 'application/font-sfnt', type: 'font'},
    woff: {mime: 'application/font-woff', type: 'font'},
    woff2: {mime: 'application/font-woff', type: 'font'},

    /* package */
    pdf: {mime: 'application/pdf', type: 'package'},
    ps: {mime: 'application/postscript', type: 'package'},
    psd: {mime: 'image/vnd.adobe.photoshop', type: 'package'},
    rtf: {mime: 'application/rtf', type: 'package'},
    zip: {mime: 'application/zip', type: 'package'}
}