diff --git a/README.md b/README.md
index 273e784..b55c296 100644
--- a/README.md
+++ b/README.md
@@ -53,6 +53,7 @@
 | `IsRegex(regex: RegExp)`                             | Checks if the string match the given RegExp.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
 | `IsEmail()`                                          | Checks if the string is an email.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
 | `IsPhoneNumber(country: string)`                     | Checks if the string is a local phone number for a country. Country must be ISO 3166 c.a.d 2 letter code. Example: FR, US, UK, DE                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
+| `IsHalfWidth()`                                      | Checks if the string is half-width string. Example: A, b, c.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
 | `IsInternationalPhoneNumber()`                       | Checks if the string is an international phone number with extension and with or without leading 0. Example: +330XXXXXXXXX or +33XXXXXXXXX                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
 | `IsLowerCase()`                                      | Checks if the string is in lower case.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
 | `IsUpperCase()`                                      | Checks if the string is in uppercase.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
diff --git a/spec/validators/common.test.ts b/spec/validators/common.test.ts
index 780d170..7ca8cf6 100644
--- a/spec/validators/common.test.ts
+++ b/spec/validators/common.test.ts
@@ -20,6 +20,7 @@ import {
 	IsDecimal,
 	IsDivisibleBy,
 	IsEmpty,
+	IsHalfWidth,
 	IsHexadecimal,
 	IsHexColor,
 	IsIP,
@@ -82,6 +83,8 @@ class BodyPayload {
 
 	@IsLowerCase()
 	public isLowerCase!: string;
+	@IsHalfWidth()
+	public isHalfWidth!: string;
 	@IsHexColor()
 	public IsHexColor!: string;
 	@IsHexadecimal()
@@ -120,6 +123,7 @@ Deno.test('Common validators errors', async (ctx) => {
 	failingPayload.isDecimal = 'nondecimal';
 	failingPayload.isEmpty = 'nonEmpty';
 	failingPayload.isLowerCase = 'UPPERCASE';
+	failingPayload.isHalfWidth = 'Ｈｅｌｌｏ';
 	failingPayload.IsHexColor = 'nonHexcolor';
 	failingPayload.isHexadecimal = 'GG';
 	failingPayload.isIP = '192.168.0.256';
@@ -281,6 +285,13 @@ Deno.test('Common validators errors', async (ctx) => {
 			property: 'isLowerCase',
 		}]);
 	});
+	await ctx.step('IsHalfWidth', () => {
+		assertArrayIncludes(errors, [{
+			errorMessage: `Property must be a half-width string`,
+			constraints: [],
+			property: 'isHalfWidth',
+		}]);
+	});
 	await ctx.step('IsHexColor', () => {
 		assertArrayIncludes(errors, [{
 			errorMessage: `Property must be a hexcolor string`,
diff --git a/validators/common.ts b/validators/common.ts
index 688ea48..de7e313 100644
--- a/validators/common.ts
+++ b/validators/common.ts
@@ -18,6 +18,7 @@ import {
 	isDecimal,
 	isDivisibleBy,
 	isEmpty,
+	isHalfWidth,
 	isHexadecimal,
 	isHexColor,
 	isIP,
@@ -213,6 +214,15 @@ export function IsLowerCase(): PropertyDecorator {
 		constraints: [],
 	});
 }
+/**
+ * Decorator that checks if the property is a half-width string.
+ */
+export function IsHalfWidth(): PropertyDecorator {
+	return createDecorator((prop: string) => isHalfWidth(prop), {
+		errorMessage: 'Property must be a half-width string',
+		constraints: [],
+	});
+}
 /**
  * Decorator that checks if the property is a hex color string.
  */