diff --git a/src/core/config/Categories.json b/src/core/config/Categories.json
old mode 100755
new mode 100644
index 5b8de4753..4dd4a1c52
--- a/src/core/config/Categories.json
+++ b/src/core/config/Categories.json
@@ -321,6 +321,7 @@
             "Bcrypt parse",
             "Scrypt",
             "Argon2",
+            "Argon2 compare",
             "Fletcher-8 Checksum",
             "Fletcher-16 Checksum",
             "Fletcher-32 Checksum",
diff --git a/src/core/operations/Argon2Compare.mjs b/src/core/operations/Argon2Compare.mjs
new file mode 100644
index 000000000..ab41851fd
--- /dev/null
+++ b/src/core/operations/Argon2Compare.mjs
@@ -0,0 +1,56 @@
+/**
+ * @author Tan Zhen Yong [tzy@beyondthesprawl.com]
+ * @copyright Crown Copyright 2019
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import argon2 from "argon2-browser";
+
+/**
+ * Argon2 compare operation
+ */
+class Argon2Compare extends Operation {
+
+    /**
+     * Argon2Compare constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Argon2 compare";
+        this.module = "Crypto";
+        this.description = "Tests whether the input matches the given Argon2 hash. To test multiple possible passwords, use the 'Fork' operation.";
+        this.infoURL = "https://wikipedia.org/wiki/Argon2";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                "name": "Hash",
+                "type": "string",
+                "value": ""
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const encoded = args[0];
+
+        return argon2.verify({
+            pass: input,
+            encoded
+        }).then(_ => {
+            return `Match: ${input}`;
+        }).catch(_ => {
+            return "No match";
+        });
+    }
+
+}
+
+export default Argon2Compare;
diff --git a/tests/node/tests/operations.mjs b/tests/node/tests/operations.mjs
index e0ac777b5..6003d34c9 100644
--- a/tests/node/tests/operations.mjs
+++ b/tests/node/tests/operations.mjs
@@ -138,6 +138,13 @@ Tiger-128`;
         assert.strictEqual(result.toString(), "$argon2i$v=19$m=4096,t=3,p=1$c29tZXNhbHQ$s43my9eBljQADuF/LWCG8vGqwAJzOorKQ0Yog8jFvbw");
     }),
 
+    it("Argon2 compare", async () => {
+        const result = await chef.Argon2Compare("argon2password", {
+            hash: "$argon2i$v=19$m=4096,t=3,p=1$c29tZXNhbHQ$s43my9eBljQADuF/LWCG8vGqwAJzOorKQ0Yog8jFvbw"
+        });
+        assert.strictEqual(result.toString(), "Match: argon2password");
+    }),
+
     it("Bcrypt", async () => {
         const result = await chef.bcrypt("Put a Sock In It");
         const strResult = result.toString();