diff --git a/src/core/operations/BLAKE2b.mjs b/src/core/operations/BLAKE2b.mjs
index 5be45e70..7124cd52 100644
--- a/src/core/operations/BLAKE2b.mjs
+++ b/src/core/operations/BLAKE2b.mjs
@@ -6,6 +6,9 @@
 
 import Operation from "../Operation";
 import blakejs from "blakejs";
+import OperationError from "../errors/OperationError";
+import Utils from "../Utils";
+import { toBase64 } from "../lib/Base64";
 
 /**
  * BLAKE2b operation
@@ -29,6 +32,10 @@ class BLAKE2b extends Operation {
                 "name": "Size",
                 "type": "option",
                 "value": ["512", "384", "256", "160", "128"]
+            }, {
+                "name": "Output Encoding",
+                "type": "option",
+                "value": ["Hex", "Base64", "Raw"]
             }
         ];
     }
@@ -36,11 +43,21 @@ class BLAKE2b extends Operation {
     /**
      * @param {string} input
      * @param {Object[]} args
-     * @returns {string} The input having been hashed with BLAKE2b, HEX encoded.
+     * @returns {string} The input having been hashed with BLAKE2b in the encoding format speicifed.
      */
     run(input, args) {
-        const [outSize] = args;
-        return blakejs.blake2bHex(input, null, outSize / 8);
+        const [outSize, outFormat] = args;
+
+        switch (outFormat) {
+            case "Hex":
+                return blakejs.blake2bHex(input, null, outSize / 8);
+            case "Base64":
+                return toBase64(blakejs.blake2b(input, null, outSize / 8));
+            case "Raw":
+                return Utils.arrayBufferToStr(blakejs.blake2b(input, null, outSize / 8).buffer);
+            default:
+                return new OperationError("Unsupported Output Type");
+        }
     }
 
 }
diff --git a/src/core/operations/BLAKE2s.mjs b/src/core/operations/BLAKE2s.mjs
index bb9402f6..2e7f5dd9 100644
--- a/src/core/operations/BLAKE2s.mjs
+++ b/src/core/operations/BLAKE2s.mjs
@@ -6,7 +6,9 @@
 
 import Operation from "../Operation";
 import blakejs from "blakejs";
-
+import OperationError from "../errors/OperationError";
+import Utils from "../Utils";
+import { toBase64 } from "../lib/Base64";
 /**
  * BLAKE2s Operation
  */
@@ -29,6 +31,10 @@ class BLAKE2s extends Operation {
                 "name": "Size",
                 "type": "option",
                 "value": ["256", "160", "128"]
+            }, {
+                "name": "Output Encoding",
+                "type": "option",
+                "value": ["Hex", "Base64", "Raw"]
             }
         ];
     }
@@ -36,11 +42,20 @@ class BLAKE2s extends Operation {
     /**
      * @param {string} input
      * @param {Object[]} args
-     * @returns {string} The input having been hashed with BLAKE2s, HEX encoded.
+     * @returns {string} The input having been hashed with BLAKE2s in the encoding format speicifed.
      */
     run(input, args) {
-        const [outSize] = args;
-        return blakejs.blake2sHex(input, null, outSize / 8);
+        const [outSize, outFormat] = args;
+        switch (outFormat) {
+            case "Hex":
+                return blakejs.blake2sHex(input, null, outSize / 8);
+            case "Base64":
+                return toBase64(blakejs.blake2s(input, null, outSize / 8));
+            case "Raw":
+                return Utils.arrayBufferToStr(blakejs.blake2s(input, null, outSize / 8).buffer);
+            default:
+                return new OperationError("Unsupported Output Type");
+        }
     }
 
 }
diff --git a/tests/operations/tests/BLAKE2b.mjs b/tests/operations/tests/BLAKE2b.mjs
index 41d47f23..0c05cd76 100644
--- a/tests/operations/tests/BLAKE2b.mjs
+++ b/tests/operations/tests/BLAKE2b.mjs
@@ -2,7 +2,7 @@
  * BitwiseOp tests
  *
  * @author h345983745
- * @copyright Crown Copyright 2017
+ * @copyright Crown Copyright 2019
  * @license Apache-2.0
  */
 import TestRegister from "../TestRegister";
@@ -14,7 +14,7 @@ TestRegister.addTests([
         expectedOutput: "4386a08a265111c9896f56456e2cb61a64239115c4784cf438e36cc851221972da3fb0115f73cd02486254001f878ab1fd126aac69844ef1c1ca152379d0a9bd",
         recipeConfig: [
             { "op": "BLAKE2b",
-                "args": ["512"] }
+                "args": ["512", "Hex"] }
         ]
     },
     {
@@ -23,7 +23,7 @@ TestRegister.addTests([
         expectedOutput: "4d388e82ca8f866e606b6f6f0be910abd62ad6e98c0adfc27cf35acf948986d5c5b9c18b6f47261e1e679eb98edf8e2d",
         recipeConfig: [
             { "op": "BLAKE2b",
-                "args": ["384"] }
+                "args": ["384", "Hex"] }
         ]
     },
     {
@@ -32,7 +32,7 @@ TestRegister.addTests([
         expectedOutput: "1dc01772ee0171f5f614c673e3c7fa1107a8cf727bdf5a6dadb379e93c0d1d00",
         recipeConfig: [
             { "op": "BLAKE2b",
-                "args": ["256"] }
+                "args": ["256", "Hex"] }
         ]
     },
     {
@@ -41,7 +41,7 @@ TestRegister.addTests([
         expectedOutput: "6a8489e6fd6e51fae12ab271ec7fc8134dd5d737",
         recipeConfig: [
             { "op": "BLAKE2b",
-                "args": ["160"] }
+                "args": ["160", "Hex"] }
         ]
     }
 ]);
diff --git a/tests/operations/tests/BLAKE2s.mjs b/tests/operations/tests/BLAKE2s.mjs
index 092ac29c..80771430 100755
--- a/tests/operations/tests/BLAKE2s.mjs
+++ b/tests/operations/tests/BLAKE2s.mjs
@@ -2,7 +2,7 @@
  * BitwiseOp tests
  *
  * @author h345983745
- * @copyright Crown Copyright 2017
+ * @copyright Crown Copyright 2019
  * @license Apache-2.0
  */
 import TestRegister from "../TestRegister";
@@ -14,7 +14,7 @@ TestRegister.addTests([
         expectedOutput: "7706af019148849e516f95ba630307a2018bb7bf03803eca5ed7ed2c3c013513",
         recipeConfig: [
             { "op": "BLAKE2s",
-                "args": ["256"] }
+                "args": ["256", "Hex"] }
         ]
     },
     {
@@ -23,7 +23,7 @@ TestRegister.addTests([
         expectedOutput: "0e4fcfc2ee0097ac1d72d70b595a39e09a3c7c7e",
         recipeConfig: [
             { "op": "BLAKE2s",
-                "args": ["160"] }
+                "args": ["160", "Hex"] }
         ]
     },
     {
@@ -32,7 +32,7 @@ TestRegister.addTests([
         expectedOutput: "9964ee6f36126626bf864363edfa96f6",
         recipeConfig: [
             { "op": "BLAKE2s",
-                "args": ["128"] }
+                "args": ["128", "Hex"] }
         ]
     }
 ]);