Small 128-bit FNV-1a library for the browser.

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601.2.09 years ago9 years agoMinified + gzip package size for fnv-lite in KB


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A much smaller FNV-1a hash library, friendlier to browsers.
fnv-lite implements the 128-bit variant of Fowler-Noll-Vo version 1a. It emits hashes in hex, base64, and as a raw array of octets.


fnv-lite is a UMD module, so you can use it with require.js, Node, browserify, or directly in your browser window, in which case it will export window.FNV.
npm install --save fnv-lite

var FNV = require('fnv-lite');

console.log(FNV.hex('')); // 6c62272e07bb014262b821756295c58d
console.log(FNV.base64('')); // bGInLge7AUJiuCF1YpXFjQ==
console.log(FNV.base64Url('')); // bGInLge7AUJiuCF1YpXFjQ
console.log(FNV.base36('')); // 6ezv16m7wweombnkd3ldlii6l



Returns the FNV-1a hash of string as a hex string.


Returns the FNV-1a hash of string as a base36-encoded string. Base36 is a relic of the Javascript universe, in that it happens to be the largest number base you can pass to Number#toString(). This method is included because it replicates the behavior of the str() serialization in fnv-plus.


Returns the FNV-1a hash of string as a base64-encoded string.


Returns the FNV-1a hash of string as a URL-safe base64-encoded string, which is different from a regular base64 string in the following respects:
  • "+" becomes "-".
  • "/" becomes "\_".
  • The trailing padding characters (==) are omitted.

new FNV()

Create a new FNV hash object.


Add the contents of the supplied string/byte array to the hash and recompute its value.
Returns the original FNV object, so you can chain it.

FNV#digest('hex' | 'base36' | 'base64')

Retrieve the current value of the hash in hexadecimal, base36 (a Javascript relic), or base64. If you don't supply a digest type, fnv-lite will return the current hash value as a "byte" array.

Why not fnv-plus?

fnv-plus is an excellent library for server-side operations. Unfortunately it requires the jsbn library, which adds quite a lot of girth to browser builds.