diff --git a/README.md b/README.md
index e8b7aedd9..cce8b1efa 100644
--- a/README.md
+++ b/README.md
@@ -153,6 +153,7 @@ Validator                               | Description
 **isMobilePhone(str [, locale [, options]])**          | check if the string is a mobile phone number,<br/><br/>`locale` is either an array of locales (e.g. `['sk-SK', 'sr-RS']`) OR one of `['am-AM', 'ar-AE', 'ar-BH', 'ar-DZ', 'ar-LB', 'ar-EG', 'ar-IQ', 'ar-JO', 'ar-KW', 'ar-LY', 'ar-MA', 'ar-OM', 'ar-PS', 'ar-SA', 'ar-SD', 'ar-SY', 'ar-TN', 'az-AZ', 'ar-QA', 'bs-BA', 'be-BY', 'bg-BG', 'bn-BD', 'ca-AD', 'cs-CZ', 'da-DK', 'de-DE', 'de-AT', 'de-CH', 'de-LU', 'dv-MV', 'el-GR', 'el-CY', 'en-AI', 'en-AU', 'en-AG', 'en-BM', 'en-BS', 'en-GB', 'en-GG', 'en-GH', 'en-GY', 'en-HK', 'en-MO', 'en-IE', 'en-IN', 'en-JM', 'en-KE', 'fr-CF', 'en-SS', 'en-KI', 'en-KN', 'en-LS', 'en-MT', 'en-MU', 'en-MW', 'en-NA', 'en-NG', 'en-NZ', 'en-PG', 'en-PK', 'en-PH', 'en-RW', 'en-SG', 'en-SL', 'en-TZ', 'en-UG', 'en-US', 'en-ZA', 'en-ZM', 'en-ZW', 'en-BW', 'es-AR', 'es-BO', 'es-CO', 'es-CL', 'es-CR', 'es-CU', 'es-DO', 'es-HN', 'es-EC', 'es-ES', 'es-GT', 'es-PE', 'es-MX', 'es-NI', 'es-PA', 'es-PY', 'es-SV', 'es-UY', 'es-VE', 'et-EE', 'fa-IR', 'fi-FI', 'fj-FJ', 'fo-FO', 'fr-BF', 'fr-BJ', 'fr-CD', 'fr-CM', 'fr-DJ', 'fr-FR', 'fr-GF', 'fr-GP', 'fr-MQ', 'fr-PF', 'fr-RE', 'fr-WF', 'he-IL', 'hu-HU', 'id-ID', 'ir-IR', 'it-IT', 'it-SM', 'ja-JP', 'ka-GE', 'kk-KZ', 'kl-GL', 'ko-KR', 'ky-KG', 'lt-LT', 'lv-LV', 'mg-MG', 'mn-MN', 'my-MM', 'ms-MY', 'mz-MZ', 'nb-NO', 'ne-NP', 'nl-BE', 'nl-NL', 'nl-AW', 'nn-NO', 'pl-PL', 'pt-BR', 'pt-PT', 'pt-AO', 'ro-MD', 'ro-RO', 'ru-RU', 'si-LK', 'sl-SI', 'sk-SK', 'so-SO', 'sq-AL', 'sr-RS', 'sv-SE', 'tg-TJ', 'th-TH', 'tr-TR', 'tk-TM', 'uk-UA', 'uz-UZ', 'vi-VN', 'zh-CN', 'zh-TW', 'dz-BT', 'ar-YE', 'ar-EH', 'fa-AF', 'mk-MK', 'en-CA', 'fr-CA', 'fr-BE', 'zh-HK', 'zh-MO', 'ga-IE', 'fr-CH', 'it-CH', 'en-CM']` OR defaults to `'any'`. If `any` or a falsey value is used, the function will check if any of the locales match.<br/><br/>`options` is an optional object that can be supplied with the following key: `strictMode`. If this is set to `true`, the mobile phone number must be supplied with the country code and therefore must start with `+`. Locale list is `validator.isMobilePhoneLocales`.
 **isMongoId(str)**                      | check if the string is a valid hex-encoded representation of a [MongoDB ObjectId][mongoid].
 **isMultibyte(str)**                    | check if the string contains one or more multibyte chars.
+**isNanoID(str [, options])**            | check if the string is a valid Nano ID. `options` is an object which defaults to `{ alphabets: 'A-Za-z0-9', length: '1,', hyphen: true, underscore: true }`. `alphabets` specifies the allowed characters, `length` specifies the allowed length or length range, and `hyphen` and `underscore` control whether hyphens and underscores are allowed.
 **isNumeric(str [, options])**                      | check if the string contains only numbers.<br/><br/>`options` is an object which defaults to `{ no_symbols: false }` it also has `locale` as an option. If `no_symbols` is true, the validator will reject numeric strings that feature a symbol (e.g. `+`, `-`, or `.`).<br/><br/>`locale` determines the decimal separator and is one of `['ar', 'ar-AE', 'ar-BH', 'ar-DZ', 'ar-EG', 'ar-IQ', 'ar-JO', 'ar-KW', 'ar-LB', 'ar-LY', 'ar-MA', 'ar-QA', 'ar-QM', 'ar-SA', 'ar-SD', 'ar-SY', 'ar-TN', 'ar-YE', 'bg-BG', 'cs-CZ', 'da-DK', 'de-DE', 'en-AU', 'en-GB', 'en-HK', 'en-IN', 'en-NZ', 'en-US', 'en-ZA', 'en-ZM', 'eo', 'es-ES', 'fr-FR', 'fr-CA', 'hu-HU', 'it-IT', 'nb-NO', 'nl-NL', 'nn-NO', 'pl-PL', 'pt-BR', 'pt-PT', 'ru-RU', 'sl-SI', 'sr-RS', 'sr-RS@latin', 'sv-SE', 'tr-TR', 'uk-UA']`.
 **isOctal(str)**                        | check if the string is a valid octal number.
 **isPassportNumber(str, countryCode)**    | check if the string is a valid passport number.<br/><br/>`countryCode` is one of `['AM', 'AR', 'AT', 'AU', 'AZ', 'BE', 'BG', 'BY', 'BR', 'CA', 'CH', 'CN', 'CY', 'CZ', 'DE', 'DK', 'DZ', 'EE', 'ES', 'FI', 'FR', 'GB', 'GR', 'HR', 'HU', 'IE', 'IN', 'IR', 'ID', 'IS', 'IT', 'JM', 'JP', 'KR', 'KZ', 'LI', 'LT', 'LU', 'LV', 'LY', 'MT', 'MX', 'MY', 'MZ', 'NL', 'NZ', 'PH', 'PK', 'PL', 'PT', 'RO', 'RU', 'SE', 'SL', 'SK', 'TH', 'TR', 'UA', 'US', 'ZA']`.  Locale list is `validator.passportNumberLocales`.
@@ -268,4 +269,3 @@ This project is licensed under the [MIT](LICENSE). See the [LICENSE](LICENSE) fi
 [mongoid]: http://docs.mongodb.org/manual/reference/object-id/
 [RFC 3339]: https://tools.ietf.org/html/rfc3339
 [VAT Number]: https://en.wikipedia.org/wiki/VAT_identification_number
-
diff --git a/src/index.js b/src/index.js
index 5e2cd78a7..7a597ee97 100644
--- a/src/index.js
+++ b/src/index.js
@@ -130,6 +130,7 @@ import isLicensePlate from './lib/isLicensePlate';
 import isStrongPassword from './lib/isStrongPassword';
 
 import isVAT from './lib/isVAT';
+import isNanoID from './lib/isNanoID';
 
 const version = '13.15.35';
 
@@ -246,6 +247,7 @@ const validator = {
   isLicensePlate,
   isVAT,
   ibanLocales,
+  isNanoID,
 };
 
 export default validator;
diff --git a/src/lib/isNanoID.js b/src/lib/isNanoID.js
new file mode 100644
index 000000000..a4a9f92f0
--- /dev/null
+++ b/src/lib/isNanoID.js
@@ -0,0 +1,26 @@
+import assertString from './util/assertString';
+import merge from './util/merge';
+
+function regexExp(options) {
+  const alphabets = options.alphabets;
+  const underscore = options.underscore ? '_' : '';
+  const hyphen = options.hyphen ? '-' : '';
+  const charClass = `${alphabets}${underscore}${hyphen}`;
+  const regExp = new RegExp(`^[${charClass}]{${options.length}}$`);
+  return regExp;
+}
+
+const default_options = {
+  alphabets: 'A-Za-z0-9',
+  length: '1,',
+  hyphen: true,
+  underscore: true,
+};
+
+export default function isNanoID(str, options) {
+  assertString(str);
+  options = merge(options, default_options);
+  return regexExp(options).test(str);
+}
+
+isNanoID('ABC456', { alphabets: 'ABCDEF123456' });
diff --git a/test/validators/isDecimal.test.js b/test/validators/isDecimal.test.js
new file mode 100644
index 000000000..8da276cd6
--- /dev/null
+++ b/test/validators/isDecimal.test.js
@@ -0,0 +1,46 @@
+import test from '../testFunctions';
+
+describe('isDecimal', () => {
+  it('Checks whether a number is Decimal or not', () => {
+    test({
+      validator: 'isDecimal',
+      valid: ['1.2', '+2.4', '-122.5'],
+      invalid: ['+-2.4'],
+    });
+    test({
+      validator: 'isDecimal',
+      args: [{ locale: 'ar', force_decimal: false, decimal_digits: '1' }],
+      valid: ['1٫2', '+2٫4', '-122٫5'],
+      invalid: ['+-2٫4', '2.4', '12٫8979', '1,2'],
+    });
+    test({
+      validator: 'isDecimal',
+      valid: ['1.2', '+2.4', '-122.5', '.5', '+.5', '-.5', '0.123', '1.234'],
+      invalid: ['', ' ', '+', '-', '1,2', '1.', ' 1.2', '1.2 ', '+-2.4'],
+    });
+    test({
+      validator: 'isDecimal',
+      args: [{ force_decimal: true }],
+      valid: ['1.0', '+.5', '-.5', '0.12', '.1'],
+      invalid: ['1', '2', '', '1.', ' 1.0'],
+    });
+    test({
+      validator: 'isDecimal',
+      args: [{ force_decimal: true, decimal_digits: '2' }],
+      valid: ['1.23', '+.12', '-0.12', '0.00'],
+      invalid: ['1.2', '1.234', '1', '.1', '.123'],
+    });
+    test({
+      validator: 'isDecimal',
+      args: [{ decimal_digits: '1,3' }],
+      valid: ['1.2', '1.23', '1.234', '.1', '.12', '.123'],
+      invalid: ['1.', '1.2345', '.1234'],
+    });
+    test({
+      validator: 'isDecimal',
+      args: [{ locale: 'ar' }],
+      valid: ['1٫2', '٫5', '+٫5', '-٫5'],
+      invalid: ['1.2', '1,2', '1٫', ' 1٫2'],
+    });
+  });
+});
diff --git a/test/validators/isNanoID.test.js b/test/validators/isNanoID.test.js
new file mode 100644
index 000000000..1703e7ce0
--- /dev/null
+++ b/test/validators/isNanoID.test.js
@@ -0,0 +1,56 @@
+import test from '../testFunctions';
+
+describe('isNanoID', () => {
+  it('default options', () => {
+    test({
+      validator: 'isNanoID',
+      valid: ['Aiugiu645654sdf', 'D87D', '_-jj', 'A_B-C'],
+      invalid: ['+999', 'RGRY$', ' ', '*abc'],
+    });
+  });
+
+  it('custom alphabets', () => {
+    test({
+      validator: 'isNanoID',
+      args: [{ alphabets: 'ABCDEF123' }],
+      valid: ['ACABE', '123123', 'A1_C', 'F-1'],
+      invalid: [
+        '+999',
+        'RGRY$',
+        ' ',
+        'Aiugiu645654sdf',
+        'D87D',
+        'aoihdof',
+        '_-jj',
+        'G12',
+      ],
+    });
+  });
+
+  it('hyphen disabled', () => {
+    test({
+      validator: 'isNanoID',
+      args: [{ hyphen: false }],
+      valid: ['ACABE', '123123', '_jj', 'Aiugiu645654sdf', 'D87D'],
+      invalid: ['-999', 'A-B', 'RGRY$', ' '],
+    });
+  });
+
+  it('underscore disabled', () => {
+    test({
+      validator: 'isNanoID',
+      args: [{ underscore: false }],
+      valid: ['ACABE', '123123', '-jj', 'Aiugiu645654sdf', 'D87D'],
+      invalid: ['_123', 'A_B', 'RGRY$', ' '],
+    });
+  });
+
+  it('fixed length', () => {
+    test({
+      validator: 'isNanoID',
+      args: [{ length: 6 }],
+      valid: ['ABC123', 'a1B_9-'],
+      invalid: ['ABC12', 'ABC1234', 'ABC+12'],
+    });
+  });
+});