diff --git a/src/Utils.php b/src/Utils.php
new file mode 100644
index 0000000..7cea392
--- /dev/null
+++ b/src/Utils.php
@@ -0,0 +1,52 @@
+<?php
+
+namespace Web3;
+
+use InvalidArgumentException;
+
+class Utils
+{
+    /**
+     * construct
+     *
+     * @return void
+     */
+    public function __construct()
+    {
+        // 
+    }
+
+    /**
+     * toHex
+     * 
+     * @param string $value
+     * @param bool $isPrefix
+     * @return string
+     */
+    public static function toHex($value, $isPrefix=false)
+    {
+        if (!is_string($value)) {
+            throw new InvalidArgumentException('The value to toHex function must be string.');
+        }
+        if ($isPrefix) {
+            return '0x' . implode('', unpack('H*', $value));
+        }
+        return implode('', unpack('H*', $value));
+    }
+
+    /**
+     * hexToBin
+     * 
+     * @param string
+     * @return string
+     */
+    public static function hexToBin($value)
+    {
+        if (!is_string($value)) {
+            throw new InvalidArgumentException('The value to toHex function must be string.');
+        }
+        $hexString = str_replace('0x', '', $value);
+
+        return pack('H*', $hexString);
+    }
+}
\ No newline at end of file
diff --git a/src/Web3.php b/src/Web3.php
index 8afdcae..9a6d017 100644
--- a/src/Web3.php
+++ b/src/Web3.php
@@ -14,6 +14,7 @@ namespace Web3;
 use Web3\Eth;
 use Web3\Net;
 use Web3\Personal;
+use Web3\Utils;
 use Web3\Providers\Provider;
 use Web3\Providers\HttpProvider;
 use Web3\RequestManagers\RequestManager;
@@ -50,6 +51,13 @@ class Web3
      */
     protected $personal;
 
+    /**
+     * utils
+     * 
+     * @var \Web3\Utils
+     */
+    protected $utils;
+
     /**
      * methods
      * 
@@ -257,6 +265,20 @@ class Web3
         return $this->personal;
     }
 
+    /**
+     * getUtils
+     * 
+     * @return \Web3\Utils
+     */
+    public function getUtils()
+    {
+        if (!isset($this->utils)) {
+            $utils = new Utils;
+            $this->utils = $utils;
+        }
+        return $this->utils;
+    }
+
     /**
      * batch
      * 
diff --git a/test/unit/UtilsTest.php b/test/unit/UtilsTest.php
new file mode 100644
index 0000000..2b7b47d
--- /dev/null
+++ b/test/unit/UtilsTest.php
@@ -0,0 +1,65 @@
+<?php
+
+namespace Test\Unit;
+
+use InvalidArgumentException;
+use Test\TestCase;
+use Web3\Utils;
+
+class UtilsTest extends TestCase
+{
+    /**
+     * testHex
+     * 'hello world'
+     * you can check by call pack('H*', $hex)
+     * 
+     * @var string
+     */
+    protected $testHex = '68656c6c6f20776f726c64';
+
+    /**
+     * setUp
+     * 
+     * @return void
+     */
+    public function setUp()
+    {
+        parent::setUp();
+    }
+
+    /**
+     * testToHex
+     * 
+     * @return void
+     */
+    public function testToHex()
+    {
+        $hex = Utils::toHex('hello world');
+
+        $this->assertEquals($hex, $this->testHex);
+
+        $hexPrefixed = Utils::toHex('hello world', true);
+
+        $this->assertEquals($hexPrefixed, '0x' . $this->testHex);
+    }
+
+    /**
+     * testHexToBin
+     * 
+     * @return void
+     */
+    public function testHexToBin()
+    {
+        $str = Utils::hexToBin($this->testHex);
+
+        $this->assertEquals($str, 'hello world');
+
+        $str = Utils::hexToBin('0x' . $this->testHex);
+
+        $this->assertEquals($str, 'hello world');
+
+        $str = Utils::hexToBin('0xe4b883e5bda9e7a59ee4bb99e9b1bc');
+
+        $this->assertEquals($str, '七彩神仙鱼');
+    }
+}
\ No newline at end of file
diff --git a/test/unit/Web3Test.php b/test/unit/Web3Test.php
index c326ed0..3f33d67 100644
--- a/test/unit/Web3Test.php
+++ b/test/unit/Web3Test.php
@@ -8,6 +8,7 @@ use Web3\Web3;
 use Web3\Eth;
 use Web3\Net;
 use Web3\Personal;
+use Web3\Utils;
 use Web3\Providers\HttpProvider;
 use Web3\RequestManagers\RequestManager;
 use Web3\RequestManagers\HttpRequestManager;
@@ -54,6 +55,7 @@ class Web3Test extends TestCase
         $this->assertTrue($web3->eth instanceof Eth);
         $this->assertTrue($web3->net instanceof Net);
         $this->assertTrue($web3->personal instanceof Personal);
+        $this->assertTrue($web3->utils instanceof Utils);
     }
 
     /**