diff --git a/docs/vanilla.md b/docs/vanilla.md
index 4de9b32..f77eb2f 100644
--- a/docs/vanilla.md
+++ b/docs/vanilla.md
@@ -289,3 +289,43 @@ import { getNavigatorCurrentLocation } from "utils-react";
 
 getNavigatorCurrentLocation().then((location) => console.log(location));
 ```
+
+## phoneMask
+
+Mask a phone number.
+
+```js
+import { phoneMask } from "utils-react";
+
+phoneMask("1234567890"); // (12) 3456-7890
+```
+
+## cpfMask
+
+Mask a CPF number.
+
+```js
+import { cpfMask } from "utils-react";
+
+cpfMask("12345678900"); // 123.456.789-00
+```
+
+## cnpjMask
+
+Mask a CNPJ number.
+
+```js
+import { cnpjMask } from "utils-react";
+
+cnpjMask("12345678900000"); // 12.345.678/9000-00
+```
+
+## cepMask
+
+Mask a CEP number.
+
+```js 
+import { cepMask } from "utils-react";
+
+cepMask("12345678"); // 12345-678
+```
diff --git a/src/__test__/index.test.ts b/src/__test__/index.test.ts
index fa4e215..807fe4c 100644
--- a/src/__test__/index.test.ts
+++ b/src/__test__/index.test.ts
@@ -24,6 +24,10 @@ import {
   generateRandomString,
   generateRandomColor,
   getNavigatorCurrentLocation,
+  phoneMask,
+  cpfMask,
+  cnpjMask,
+  cepMask,
 } from "../index";
 
 describe("all methods in the package", () => {
@@ -169,4 +173,20 @@ describe("all methods in the package", () => {
       timestamp: 123,
     });
   });
+
+  it("phone mask", () => {
+    expect(phoneMask("11999999999")).toBe("(11) 99999-9999");
+  });
+
+  it("cpf mask", () => {
+    expect(cpfMask("99999999999")).toBe("999.999.999-99");
+  });
+
+  it("cnpj mask", () => {
+    expect(cnpjMask("99999999999999")).toBe("99.999.999/9999-99");
+  });
+
+  it("cep mask", () => {
+    expect(cepMask("99999999")).toBe("99999-999");
+  });
 });
diff --git a/src/modules/index.ts b/src/modules/index.ts
index e23d14f..82463cc 100644
--- a/src/modules/index.ts
+++ b/src/modules/index.ts
@@ -195,3 +195,38 @@ export const getNavigatorCurrentLocation = async ({
 
   return { coords, timestamp };
 };
+
+export const phoneMask = (value: string) => {
+  return value
+    .replace(/\D/g, "")
+    .replace(/(\d{2})(\d)/, "($1) $2")
+    .replace(/(\d{5})(\d)/, "$1-$2")
+    .replace(/(-\d{4})\d+?$/, "$1");
+};
+
+export const cpfMask = (value: string) => {
+  return value
+    .replace(/\D/g, "")
+    .replace(/(\d{3})(\d)/, "$1.$2")
+    .replace(/(\d{3})(\d)/, "$1.$2")
+    .replace(/(\d{3})(\d)/, "$1-$2")
+    .replace(/(-\d{2})\d+?$/, "$1");
+};
+
+export const cnpjMask = (value: string) => {
+  return value
+    .replace(/\D/g, "")
+    .replace(/(\d{2})(\d)/, "$1.$2")
+    .replace(/(\d{3})(\d)/, "$1.$2")
+    .replace(/(\d{3})(\d)/, "$1/$2")
+    .replace(/(\d{4})(\d)/, "$1-$2")
+    .replace(/(-\d{2})\d+?$/, "$1");
+};
+
+export const cepMask = (value: string) => {
+  if (value.length > 9) {
+    return value.slice(0, 9);
+  }
+
+  return value.replace(/\D/g, "").replace(/(\d{5})(\d)/, "$1-$2");
+};