diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
new file mode 100644
index 0000000..b85fc2a
--- /dev/null
+++ b/.github/workflows/main.yml
@@ -0,0 +1,24 @@
+name: CI
+on:
+  - push
+  - pull_request
+jobs:
+  test:
+    name: Node.js ${{ matrix.node-version }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        node-version:
+          - 14
+          - 12
+          - 10
+          - 8
+          - 6
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+      - run: npm install
+      - run: npm test
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 81f3378..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,7 +0,0 @@
-language: node_js
-node_js:
-  - '14'
-  - '12'
-  - '10'
-  - '8'
-  - '6'
diff --git a/dist/index.js b/dist/index.js
index 6e28c40..c684b0a 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -116,6 +116,8 @@ var decodeComponent = __webpack_require__(2);
 
 var splitOnFirst = __webpack_require__(3);
 
+var filterObject = __webpack_require__(4);
+
 var isNullOrUndefined = function isNullOrUndefined(value) {
   return value === null || value === undefined;
 };
@@ -362,6 +364,10 @@ function parse(query, options) {
     for (var _iterator = query.split('&')[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
       var param = _step.value;
 
+      if (param === '') {
+        continue;
+      }
+
       var _splitOnFirst = splitOnFirst(options.decode ? param.replace(/\+/g, ' ') : param, '='),
           _splitOnFirst2 = _slicedToArray(_splitOnFirst, 2),
           key = _splitOnFirst2[0],
@@ -521,6 +527,32 @@ exports.stringifyUrl = function (object, options) {
   return "".concat(url).concat(queryString).concat(hash);
 };
 
+exports.pick = function (input, filter, options) {
+  options = Object.assign({
+    parseFragmentIdentifier: true
+  }, options);
+
+  var _exports$parseUrl = exports.parseUrl(input, options),
+      url = _exports$parseUrl.url,
+      query = _exports$parseUrl.query,
+      fragmentIdentifier = _exports$parseUrl.fragmentIdentifier;
+
+  return exports.stringifyUrl({
+    url: url,
+    query: filterObject(query, filter),
+    fragmentIdentifier: fragmentIdentifier
+  }, options);
+};
+
+exports.exclude = function (input, filter, options) {
+  var exclusionFilter = Array.isArray(filter) ? function (key) {
+    return !filter.includes(key);
+  } : function (key, value) {
+    return !filter(key, value);
+  };
+  return exports.pick(input, exclusionFilter, options);
+};
+
 /***/ }),
 /* 1 */
 /***/ (function(module, exports, __webpack_require__) {
@@ -656,5 +688,29 @@ module.exports = function (string, separator) {
   return [string.slice(0, separatorIndex), string.slice(separatorIndex + separator.length)];
 };
 
+/***/ }),
+/* 4 */
+/***/ (function(module, exports, __webpack_require__) {
+
+"use strict";
+
+
+module.exports = function (obj, predicate) {
+  var ret = {};
+  var keys = Object.keys(obj);
+  var isArr = Array.isArray(predicate);
+
+  for (var i = 0; i < keys.length; i++) {
+    var key = keys[i];
+    var val = obj[key];
+
+    if (isArr ? predicate.indexOf(key) !== -1 : predicate(key, val, obj)) {
+      ret[key] = val;
+    }
+  }
+
+  return ret;
+};
+
 /***/ })
 /******/ ]);
\ No newline at end of file
diff --git a/index.d.ts b/index.d.ts
index d828894..4a115fb 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -350,7 +350,12 @@ export type StringifiableRecord = Record<
 Stringify an object into a query string and sort the keys.
 */
 export function stringify(
-	object: StringifiableRecord,
+	// TODO: Use the below instead when the following TS issues are fixed:
+	// - https://github.com/microsoft/TypeScript/issues/15300
+	// - https://github.com/microsoft/TypeScript/issues/42021
+	// Context: https://github.com/sindresorhus/query-string/issues/298
+	// object: StringifiableRecord,
+	object: Record<string, any>,
 	options?: StringifyOptions
 ): string;
 
@@ -367,7 +372,7 @@ export interface UrlObject {
 	/**
 	Overrides queries in the `url` property.
 	*/
-	readonly query: StringifiableRecord;
+	readonly query?: StringifiableRecord;
 
 	/**
 	Overrides the fragment identifier in the `url` property.
@@ -404,3 +409,81 @@ export function stringifyUrl(
 	object: UrlObject,
 	options?: StringifyOptions
 ): string;
+
+/**
+Pick query parameters from a URL.
+
+@param url - The URL containing the query parameters to pick.
+@param keys - The names of the query parameters to keep. All other query parameters will be removed from the URL.
+@param filter - A filter predicate that will be provided the name of each query parameter and its value. The `parseNumbers` and `parseBooleans` options also affect `value`.
+
+@returns The URL with the picked query parameters.
+
+@example
+```
+queryString.pick('https://foo.bar?foo=1&bar=2#hello', ['foo']);
+//=> 'https://foo.bar?foo=1#hello'
+
+queryString.pick('https://foo.bar?foo=1&bar=2#hello', (name, value) => value === 2, {parseNumbers: true});
+//=> 'https://foo.bar?bar=2#hello'
+```
+*/
+export function pick(
+	url: string,
+	keys: readonly string[],
+	options?: ParseOptions & StringifyOptions
+): string
+export function pick(
+	url: string,
+	filter: (key: string, value: string | boolean | number) => boolean,
+	options?: {parseBooleans: true, parseNumbers: true} & ParseOptions & StringifyOptions
+): string
+export function pick(
+	url: string,
+	filter: (key: string, value: string | boolean) => boolean,
+	options?: {parseBooleans: true} & ParseOptions & StringifyOptions
+): string
+export function pick(
+	url: string,
+	filter: (key: string, value: string | number) => boolean,
+	options?: {parseNumbers: true} & ParseOptions & StringifyOptions
+): string
+
+/**
+Exclude query parameters from a URL. Like `.pick()` but reversed.
+
+@param url - The URL containing the query parameters to exclude.
+@param keys - The names of the query parameters to remove. All other query parameters will remain in the URL.
+@param filter - A filter predicate that will be provided the name of each query parameter and its value. The `parseNumbers` and `parseBooleans` options also affect `value`.
+
+@returns The URL without the excluded the query parameters.
+
+@example
+```
+queryString.exclude('https://foo.bar?foo=1&bar=2#hello', ['foo']);
+//=> 'https://foo.bar?bar=2#hello'
+
+queryString.exclude('https://foo.bar?foo=1&bar=2#hello', (name, value) => value === 2, {parseNumbers: true});
+//=> 'https://foo.bar?foo=1#hello'
+```
+*/
+export function exclude(
+	url: string,
+	keys: readonly string[],
+	options?: ParseOptions & StringifyOptions
+): string
+export function exclude(
+	url: string,
+	filter: (key: string, value: string | boolean | number) => boolean,
+	options?: {parseBooleans: true, parseNumbers: true} & ParseOptions & StringifyOptions
+): string
+export function exclude(
+	url: string,
+	filter: (key: string, value: string | boolean) => boolean,
+	options?: {parseBooleans: true} & ParseOptions & StringifyOptions
+): string
+export function exclude(
+	url: string,
+	filter: (key: string, value: string | number) => boolean,
+	options?: {parseNumbers: true} & ParseOptions & StringifyOptions
+): string
diff --git a/index.js b/index.js
index 559ecd4..423b9d6 100644
--- a/index.js
+++ b/index.js
@@ -2,6 +2,7 @@
 const strictUriEncode = require('strict-uri-encode');
 const decodeComponent = require('decode-uri-component');
 const splitOnFirst = require('split-on-first');
+const filterObject = require('filter-obj');
 
 const isNullOrUndefined = value => value === null || value === undefined;
 
@@ -244,6 +245,10 @@ function parse(query, options) {
 	}
 
 	for (const param of query.split('&')) {
+		if (param === '') {
+			continue;
+		}
+
 		let [key, value] = splitOnFirst(options.decode ? param.replace(/\+/g, ' ') : param, '=');
 
 		// Missing `=` should be `null`:
@@ -378,3 +383,22 @@ exports.stringifyUrl = (object, options) => {
 
 	return `${url}${queryString}${hash}`;
 };
+
+exports.pick = (input, filter, options) => {
+	options = Object.assign({
+		parseFragmentIdentifier: true
+	}, options);
+
+	const {url, query, fragmentIdentifier} = exports.parseUrl(input, options);
+	return exports.stringifyUrl({
+		url,
+		query: filterObject(query, filter),
+		fragmentIdentifier
+	}, options);
+};
+
+exports.exclude = (input, filter, options) => {
+	const exclusionFilter = Array.isArray(filter) ? key => !filter.includes(key) : (key, value) => !filter(key, value);
+
+	return exports.pick(input, exclusionFilter, options);
+};
diff --git a/index.test-d.ts b/index.test-d.ts
index 9c46344..2032584 100644
--- a/index.test-d.ts
+++ b/index.test-d.ts
@@ -35,6 +35,17 @@ expectType<string>(
 	)
 );
 
+// Ensure it accepts an `interface`.
+interface Query {
+	foo: string;
+}
+
+const query: Query = {
+	foo: 'bar'
+};
+
+queryString.stringify(query);
+
 // Parse
 expectType<queryString.ParsedQuery>(queryString.parse('?foo=bar'));
 
@@ -113,3 +124,9 @@ expectType<string>(
 		},
 	})
 );
+
+// Pick
+expectType<string>(queryString.pick('http://foo.bar/?abc=def&hij=klm', ['abc']))
+
+// Exclude
+expectType<string>(queryString.exclude('http://foo.bar/?abc=def&hij=klm', ['abc']))
diff --git a/package.json b/package.json
index 80b4fd3..58be3b1 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "query-string-for-all",
-	"version": "6.13.7",
+	"version": "6.14.1",
 	"description": "Parse and stringify URL query strings",
 	"license": "MIT",
 	"repository": "cdeutsch/query-string-for-all",
@@ -36,7 +36,8 @@
 		"stringify",
 		"encode",
 		"decode",
-		"searchparams"
+		"searchparams",
+		"filter"
 	],
 	"dependencies": {},
 	"devDependencies": {
@@ -49,6 +50,7 @@
 		"benchmark": "^2.1.4",
 		"deep-equal": "^1.0.1",
 		"fast-check": "^1.5.0",
+		"filter-obj": "^1.1.0",
 		"split-on-first": "^1.0.0",
 		"strict-uri-encode": "^2.0.0",
 		"tsd": "^0.7.3",
diff --git a/readme.md b/readme.md
index d2b9a9f..ff187ea 100644
--- a/readme.md
+++ b/readme.md
@@ -391,6 +391,64 @@ Type: `object`
 
 Query items to add to the URL.
 
+### .pick(url, keys, options?)
+### .pick(url, filter, options?)
+
+Pick query parameters from a URL.
+
+Returns a string with the new URL.
+
+```js
+const queryString = require('query-string');
+
+queryString.pick('https://foo.bar?foo=1&bar=2#hello', ['foo']);
+//=> 'https://foo.bar?foo=1#hello'
+
+queryString.pick('https://foo.bar?foo=1&bar=2#hello', (name, value) => value === 2, {parseNumbers: true});
+//=> 'https://foo.bar?bar=2#hello'
+```
+
+### .exclude(url, keys, options?)
+### .exclude(url, filter, options?)
+
+Exclude query parameters from a URL.
+
+Returns a string with the new URL.
+
+```js
+const queryString = require('query-string');
+
+queryString.exclude('https://foo.bar?foo=1&bar=2#hello', ['foo']);
+//=> 'https://foo.bar?bar=2#hello'
+
+queryString.exclude('https://foo.bar?foo=1&bar=2#hello', (name, value) => value === 2, {parseNumbers: true});
+//=> 'https://foo.bar?foo=1#hello'
+```
+
+#### url
+
+Type: `string`
+
+The URL containing the query parameters to filter.
+
+#### keys
+
+Type: `string[]`
+
+The names of the query parameters to filter based on the function used.
+
+#### filter
+
+Type: `(key, value) => boolean`
+
+A filter predicate that will be provided the name of each query parameter and its value. The `parseNumbers` and `parseBooleans` options also affect `value`.
+
+#### options
+
+Type: `object`
+
+[Parse options](#options) and [stringify options](#options-1).
+
 ## Nesting
 
 This module intentionally doesn't support nesting as it's not spec'd and varies between implementations, which causes a lot of [edge cases](https://github.com/visionmedia/node-querystring/issues).
diff --git a/test/exclude.js b/test/exclude.js
new file mode 100644
index 0000000..91e0d4f
--- /dev/null
+++ b/test/exclude.js
@@ -0,0 +1,17 @@
+import test from 'ava';
+import queryString from '..';
+
+test('excludes elements in a URL with a filter array', t => {
+	t.is(queryString.exclude('http://example.com/?a=1&b=2&c=3#a', ['c']), 'http://example.com/?a=1&b=2#a');
+});
+
+test('excludes elements in a URL with a filter predicate', t => {
+	t.is(queryString.exclude('http://example.com/?a=1&b=2&c=3#a', (name, value) => {
+		t.is(typeof name, 'string');
+		t.is(typeof value, 'number');
+
+		return name === 'a';
+	}, {
+		parseNumbers: true
+	}), 'http://example.com/?b=2&c=3#a');
+});
diff --git a/test/parse.js b/test/parse.js
index 84a32e5..ebe0cfd 100644
--- a/test/parse.js
+++ b/test/parse.js
@@ -13,6 +13,11 @@ test('query strings starting with a `&`', t => {
 	t.deepEqual(queryString.parse('&foo=bar&foo=baz'), {foo: ['bar', 'baz']});
 });
 
+test('query strings ending with a `&`', t => {
+	t.deepEqual(queryString.parse('foo=bar&'), {foo: 'bar'});
+	t.deepEqual(queryString.parse('foo=bar&&&'), {foo: 'bar'});
+});
+
 test('parse a query string', t => {
 	t.deepEqual(queryString.parse('foo=bar'), {foo: 'bar'});
 });
diff --git a/test/pick.js b/test/pick.js
new file mode 100644
index 0000000..e5e4381
--- /dev/null
+++ b/test/pick.js
@@ -0,0 +1,17 @@
+import test from 'ava';
+import queryString from '..';
+
+test('picks elements in a URL with a filter array', t => {
+	t.is(queryString.pick('http://example.com/?a=1&b=2&c=3#a', ['a', 'b']), 'http://example.com/?a=1&b=2#a');
+});
+
+test('picks elements in a URL with a filter predicate', t => {
+	t.is(queryString.pick('http://example.com/?a=1&b=2&c=3#a', (name, value) => {
+		t.is(typeof name, 'string');
+		t.is(typeof value, 'number');
+
+		return name === 'a';
+	}, {
+		parseNumbers: true
+	}), 'http://example.com/?a=1#a');
+});