diff --git a/src/core/operations/PEMToHex.mjs b/src/core/operations/PEMToHex.mjs
index 1c42d6a9..a4d0bdf5 100644
--- a/src/core/operations/PEMToHex.mjs
+++ b/src/core/operations/PEMToHex.mjs
@@ -5,10 +5,10 @@
  * @license Apache-2.0
  */
 
-import {fromBase64} from "../lib/Base64.mjs";
+import { fromBase64 } from "../lib/Base64.mjs";
+import { toHexFast } from "../lib/Hex.mjs";
 import Operation from "../Operation.mjs";
 import OperationError from "../errors/OperationError.mjs";
-import Utils from "../Utils.mjs";
 
 /**
  * PEM to Hex operation
@@ -22,9 +22,9 @@ class PEMToHex extends Operation {
         super();
 
         this.name = "PEM to Hex";
-        this.module = "PublicKey";
+        this.module = "Default";
         this.description = "Converts PEM (Privacy Enhanced Mail) format to a hexadecimal DER (Distinguished Encoding Rules) string.";
-        this.infoURL = "https://wikipedia.org/wiki/X.690#DER_encoding";
+        this.infoURL = "https://en.wikipedia.org/wiki/Privacy-Enhanced_Mail#Format";
         this.inputType = "string";
         this.outputType = "string";
         this.args = [];
@@ -42,7 +42,7 @@ class PEMToHex extends Operation {
      * @returns {string}
      */
     run(input, args) {
-        let output = "";
+        const output = [];
         let match;
         const regex = /-----BEGIN ([A-Z][A-Z ]+[A-Z])-----/g;
         while ((match = regex.exec(input)) !== null) {
@@ -57,10 +57,10 @@ class PEMToHex extends Operation {
             // decode base64 content
             const base64 = input.substring(indexBase64, indexFooter);
             const bytes = fromBase64(base64, "A-Za-z0-9+/=", "byteArray", true);
-            const hex = bytes.map(b => Utils.hex(b)).join("");
-            output += hex;
+            const hex = toHexFast(bytes);
+            output.push(hex);
         }
-        return output;
+        return output.join("\n");
     }
 
 }
diff --git a/tests/operations/tests/PEMtoHex.mjs b/tests/operations/tests/PEMtoHex.mjs
index 7929bfdd..b05c40a7 100644
--- a/tests/operations/tests/PEMtoHex.mjs
+++ b/tests/operations/tests/PEMtoHex.mjs
@@ -74,7 +74,7 @@ iwY6d+at4xDlIHwvZZmG4Smk56eHhvQE3I8sSAzgoLMBamQ5m3MbiULAYtxskCpC
 fjFxrL6Ziaaj7HZoneF40R30KCI9ygF8vkzxLwe3t5Y4XgHL9TYQm1+BDninupIB
 /zTeO1ygBGA66m6zpmkmuG7d8HXIducz+wIDAQAB
 -----END RSA PUBLIC KEY-----`;
-    
+
 const PEMS_RSA_PUBLIC_KEY_PKCS8 = `-----BEGIN PUBLIC KEY-----
 MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA5WykLKHiBAhmZh5Whocg
 pQQqZjdrApuRxRT21SJZx6Ce+Oz2V17/heozu5LEz63jCxW1NrBckzl/Ys8p9Leq
@@ -144,7 +144,7 @@ TestRegister.addTests([
     },
     {
         name: "PEMtoHex: No footer",
-        input: PEMS_RSA_PRIVATE_KEY_PKCS1.substr(0, 200),
+        input: PEMS_RSA_PRIVATE_KEY_PKCS1.substring(0, 200),
         expectedOutput: "PEM footer '-----END RSA PRIVATE KEY-----' not found",
         recipeConfig: [
             {
@@ -155,7 +155,7 @@ TestRegister.addTests([
     },
     {
         name: "PEMtoHex: Multiple PEMs",
-        input: PEMS_FOO + '\n' + PEMS_BAR,
+        input: PEMS_FOO + "\n" + PEMS_BAR,
         expectedOutput: "FOOBAR",
         recipeConfig: [
             {
@@ -164,13 +164,13 @@ TestRegister.addTests([
             },
             {
                 "op": "From Hex",
-                "args": ["None"]
+                "args": ["Auto"]
             }
         ]
     },
     {
         name: "PEMtoHex: Single line PEM",
-        input: PEMS_FOO.replace(/(\n|\r)/gm,""),
+        input: PEMS_FOO.replace(/(\n|\r)/gm, ""),
         expectedOutput: "FOO",
         recipeConfig: [
             {