A simple tool that allows you to add and remove any querystring from the url



Query String Manager Build Status

A simple tool that allows you to add and remove any querystring from the url


npm install --save qsm


var qsm = require('qsm');


Appends querystring to the url.

var url = 'http://mywebsite.com';
var newUrl = qsm.add(url, { userId: 1337 });

// newUrl outputs: http://mywebsite.com?userId=1337


Removes any querystring by key

var url = 'http://mywebsite.com?userId=1337&sort=type';
var newurl = qsm.remove(url, 'userId');

// newurl outputs: http://mywebsite.com?sort=type


Clears all querystrings from the url

var url = 'http://mywebsite.com?userId=1337&sort=type';
var newurl = qsm.clear(url);

// newurl outputs: http://mywebsite.com


Replaces current querystrings with new ones.

var url = 'http://mywebsite.com?userId=1337&sort=type';
var newurl = qsm.replace(url, { hasObject: true });

// newurl outputs: http://mywebsite.com?hasObject=true


Checks if the current url has the querystring. returns boolean

var exists = qsm.exist('http://mywebsite.com?userId=1337&sort=type', 'userId');

// exists returns true


Gets the value by key from the url returns either string or null

var userIds = qsm.get('http://mywebsite.com?userId=1336,1337,1338&sort=type', 'userId');

// userIds returns: "1336,1337,1338"
// or if it doesnt exist: null


Transforms the querystring to a javascript object returns object

var queryObject = qsm.objectify('http://mywebsite.com?userId=1336,1337,1338&sort=type&active=true');

// queryObject returns: 
// {
//  userId: [1336,1337,1339],
//  sort: "type",
//  active: true
// }


Encodes an object or string to base64-string and appends it to the url as Q parameter.
this uses qsm.add() method in the background, so it appends it to the Q parameter.

var obj = {a: 'QSM', version: 1.2};
var url = qsm.encode('www.myurl.com', obj);
// url === 'www.myurl.com?q=e2E6ICdRU00nLCB2ZXJzaW9uOiAxLjJ9'

Encode with specific parameter

var obj = {a: 'QSM', version: 1.2};
var url = qsm.encode('www.myurl.com', obj, 'appVersion');
// url === 'www.myurl.com?appVersion=e2E6ICdRU00nLCB2ZXJzaW9uOiAxLjJ9'


Decodes an query string from the inputted URL, returns either string or object. Decodes by default the Q parameter

var url = 'www.myurl.com?q=e2E6ICdRU00nLCB2ZXJzaW9uOiAxLjJ9';
var ret = qsm.decode(url);
// ret === {a: 'QSM', version: 1.2};

Decode with specific parameter

var url = 'www.myurl.com?appVersion=e2E6ICdRU00nLCB2ZXJzaW9uOiAxLjJ9';
var ret = qsm.decode(url, 'appVersion');
// ret === {a: 'QSM', version: 1.2};


All notable changes on this project will be documented in this file.

2.0.0 - 2017-11-17


  • Gave add function a sort() on object keys so it always returns the same URL even if the keys are shuffled, this is a must have for SEO:ers, before you had to manage the object passed in to add by youself, now qsm handles this for you.
  • Fixed so that add updates values for keys that already exists instead of appending them, there was issues when you could get multiple occurrences of the same key in your url.
  • Added a warning for users using the soon to be deprecated technique with arrays instead of pure objects. Arrays will be deprecated in next major release.

1.3.0 - 2017-04-28


  • Changed how encode and decode works, they now both support of specifiying key that should get the encoded result or what key to decode. Instead of always using the q key for this.