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blob-to-buffer travis npm downloads javascript style guide

Convert a Blob to a Buffer.

Sauce Test Status

Say you're using the 'buffer' module on npm, or browserify and you're working with lots of binary data.

Unfortunately, sometimes the browser or someone else's API gives you a Blob. Silly browser. How do you convert it to a Buffer?

Something with a goofy FileReader thingy... Time to Google for it yet again... There must be a better way!

There is! Simply use this module!

Works in the browser. This module is used by WebTorrent!


npm install blob-to-buffer


var toBuffer = require('blob-to-buffer')
// Get a Blob somehow...
var blob = new Blob([ new Uint8Array([1, 2, 3]) ], { type: 'application/octet-binary' })
toBuffer(blob, function (err, buffer) {
  if (err) throw err
  buffer[0] // => 1
  buffer.readUInt8(1) // => 2


MIT. Copyright (c) Feross Aboukhadijeh.