diff --git a/package-lock.json b/package-lock.json
index ef2da3f0..edc15036 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -46,6 +46,7 @@
         "file-saver": "^2.0.5",
         "flat": "^6.0.1",
         "geodesy": "1.1.3",
+        "hash-wasm": "^4.12.0",
         "highlight.js": "^11.9.0",
         "ieee754": "^1.2.1",
         "jimp": "^0.22.12",
@@ -10940,6 +10941,11 @@
         "node": ">= 0.10"
       }
     },
+    "node_modules/hash-wasm": {
+      "version": "4.12.0",
+      "resolved": "https://registry.npmjs.org/hash-wasm/-/hash-wasm-4.12.0.tgz",
+      "integrity": "sha512-+/2B2rYLb48I/evdOIhP+K/DD2ca2fgBjp6O+GBEnCDk2e4rpeXIK8GvIyRPjTezgmWn9gmKwkQjjx6BtqDHVQ=="
+    },
     "node_modules/hash.js": {
       "version": "1.1.7",
       "resolved": "https://registry.npmjs.org/hash.js/-/hash.js-1.1.7.tgz",
diff --git a/package.json b/package.json
index b3492a8e..adfdcc86 100644
--- a/package.json
+++ b/package.json
@@ -132,6 +132,7 @@
     "file-saver": "^2.0.5",
     "flat": "^6.0.1",
     "geodesy": "1.1.3",
+    "hash-wasm": "^4.12.0",
     "highlight.js": "^11.9.0",
     "ieee754": "^1.2.1",
     "jimp": "^0.22.12",
diff --git a/src/core/config/Categories.json b/src/core/config/Categories.json
index 71b311e6..19e84f76 100644
--- a/src/core/config/Categories.json
+++ b/src/core/config/Categories.json
@@ -422,6 +422,7 @@
             "Snefru",
             "BLAKE2b",
             "BLAKE2s",
+            "BLAKE3",
             "GOST Hash",
             "Streebog",
             "SSDEEP",
diff --git a/src/core/operations/BLAKE3.mjs b/src/core/operations/BLAKE3.mjs
new file mode 100644
index 00000000..0f686120
--- /dev/null
+++ b/src/core/operations/BLAKE3.mjs
@@ -0,0 +1,58 @@
+/**
+ * @author xumptex [xumptex@outlook.fr]
+ * @copyright Crown Copyright 2025
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import OperationError from "../errors/OperationError.mjs";
+import { blake3 } from "hash-wasm";
+/**
+ * BLAKE3 operation
+ */
+class BLAKE3 extends Operation {
+
+    /**
+     * BLAKE3 constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "BLAKE3";
+        this.module = "Hashing";
+        this.description = "Hashes the input using BLAKE3 (UTF-8 encoded), with an optional key (also UTF-8), and outputs the result in hexadecimal format.";
+        this.infoURL = "https://en.wikipedia.org/wiki/BLAKE_(hash_function)#BLAKE3";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                "name": "Size (bytes)",
+                "type": "number"
+            }, {
+                "name": "Key",
+                "type": "string",
+                "value": ""
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const key = args[1];
+        const size = args[0];
+        // Check if the user want a key hash or not
+        if (key === "") {
+            return blake3(input, size*8);
+        } if (key.length !== 32) {
+            throw new OperationError("The key must be exactly 32 bytes long");
+        }
+        return blake3(input, size*8, key);
+    }
+
+}
+
+export default BLAKE3;
diff --git a/tests/operations/index.mjs b/tests/operations/index.mjs
index bb7016bb..a4a27727 100644
--- a/tests/operations/index.mjs
+++ b/tests/operations/index.mjs
@@ -31,6 +31,7 @@ import "./tests/BCD.mjs";
 import "./tests/BitwiseOp.mjs";
 import "./tests/BLAKE2b.mjs";
 import "./tests/BLAKE2s.mjs";
+import "./tests/BLAKE3.mjs";
 import "./tests/Bombe.mjs";
 import "./tests/BSON.mjs";
 import "./tests/ByteRepr.mjs";
diff --git a/tests/operations/tests/BLAKE3.mjs b/tests/operations/tests/BLAKE3.mjs
new file mode 100644
index 00000000..42cb4dc1
--- /dev/null
+++ b/tests/operations/tests/BLAKE3.mjs
@@ -0,0 +1,55 @@
+/**
+ * BLAKE3 tests.
+ * @author xumptex [xumptex@outlook.fr]
+ * @copyright Crown Copyright 2025
+ * @license Apache-2.0
+ */
+import TestRegister from "../../lib/TestRegister.mjs";
+
+TestRegister.addTests([
+    {
+        name: "BLAKE3: 8 - Hello world",
+        input: "Hello world",
+        expectedOutput: "e7e6fb7d2869d109",
+        recipeConfig: [
+            { "op": "BLAKE3",
+                "args": [8, ""] }
+        ]
+    },
+    {
+        name: "BLAKE3: 16 - Hello world 2",
+        input: "Hello world 2",
+        expectedOutput: "2a3df5fe5f0d3fcdd995fc203c7f7c52",
+        recipeConfig: [
+            { "op": "BLAKE3",
+                "args": [16, ""] }
+        ]
+    },
+    {
+        name: "BLAKE3: 32 - Hello world",
+        input: "Hello world",
+        expectedOutput: "e7e6fb7d2869d109b62cdb1227208d4016cdaa0af6603d95223c6a698137d945",
+        recipeConfig: [
+            { "op": "BLAKE3",
+                "args": [32, ""] }
+        ]
+    },
+    {
+        name: "BLAKE3: Key Test",
+        input: "Hello world",
+        expectedOutput: "59dd23ac9d025690",
+        recipeConfig: [
+            { "op": "BLAKE3",
+                "args": [8, "ThiskeyisexactlythirtytwoBytesLo"] }
+        ]
+    },
+    {
+        name: "BLAKE3: Key Test 2",
+        input: "Hello world",
+        expectedOutput: "c8302c9634c1da42",
+        recipeConfig: [
+            { "op": "BLAKE3",
+                "args": [8, "ThiskeyisexactlythirtytwoByteslo"] }
+        ]
+    }
+]);