diff --git a/components/string_utils.cpp b/components/string_utils.cpp
new file mode 100644
index 0000000..740cc1c
--- /dev/null
+++ b/components/string_utils.cpp
@@ -0,0 +1,64 @@
+#include "string_utils.hpp"
+
+#include <stdint.h>
+#include <string.h>
+
+using namespace iflytop;
+/*******************************************************************************
+ *                                    TOOLS                                    *
+ *******************************************************************************/
+uint8_t *StringUtils::hex_str_to_bytes(char *data, int32_t len, int32_t &bytelen) {
+  /**
+   * @brief
+   *  data:
+   *    12 34 56 78 90 ab cd ef
+   *
+   */
+  static uint8_t bytes_cache[1024] = {0};
+  static uint8_t data_cache[1024]  = {0};
+
+  int32_t data_len = 0;
+
+  memset(bytes_cache, 0, sizeof(bytes_cache));
+  memset(data_cache, 0, sizeof(data_cache));
+
+  for (int32_t i = 0; i < len; i++) {
+    if (data[i] == ' ') continue;
+    if (data[i] == '\r' || data[i] == '\n' || data[i] == '\0') break;
+    data_cache[data_len] = data[i];
+    data_len++;
+  }
+
+  if (data_len % 2 != 0) {
+    return NULL;
+  }
+
+  for (int32_t i = 0; i < data_len; i += 2) {
+    char c1 = data_cache[i];
+    char c2 = data_cache[i + 1];
+    if (c1 >= '0' && c1 <= '9') {
+      c1 = c1 - '0';
+    } else if (c1 >= 'a' && c1 <= 'f') {
+      c1 = c1 - 'a' + 10;
+    } else if (c1 >= 'A' && c1 <= 'F') {
+      c1 = c1 - 'A' + 10;
+    } else {
+      return NULL;
+    }
+
+    if (c2 >= '0' && c2 <= '9') {
+      c2 = c2 - '0';
+    } else if (c2 >= 'a' && c2 <= 'f') {
+      c2 = c2 - 'a' + 10;
+    } else if (c2 >= 'A' && c2 <= 'F') {
+      c2 = c2 - 'A' + 10;
+    } else {
+      return NULL;
+    }
+
+    bytes_cache[i / 2] = (c1 << 4) | c2;
+  }
+
+  bytelen = data_len / 2;
+  return bytes_cache;
+}
\ No newline at end of file
diff --git a/components/string_utils.hpp b/components/string_utils.hpp
new file mode 100644
index 0000000..dd4249d
--- /dev/null
+++ b/components/string_utils.hpp
@@ -0,0 +1,13 @@
+#pragma once
+#include <stdint.h>
+namespace iflytop {
+using namespace std;
+class StringUtils {
+ private:
+  /* data */
+ public:
+  StringUtils(/* args */){};
+  ~StringUtils(){};
+  static uint8_t *hex_str_to_bytes(char *data, int32_t len, int32_t &bytelen);
+};
+}  // namespace iflytop