diff --git a/base-64/base-64-tests.ts b/base-64/base-64-tests.ts
new file mode 100644
index 0000000000..a0f85f09aa
--- /dev/null
+++ b/base-64/base-64-tests.ts
@@ -0,0 +1,13 @@
+import * as base64 from 'base-64';
+import * as utf8 from 'utf8';
+ 
+let text = 'foo © bar 𝌆 baz';
+let bytes = utf8.encode(text);
+let encoded = base64.encode(bytes);
+// → 'Zm9vIMKpIGJhciDwnYyGIGJheg==' 
+
+encoded = 'Zm9vIMKpIGJhciDwnYyGIGJheg==';
+bytes = base64.decode(encoded);
+text = utf8.decode(bytes);
+
+let version = base64.version;
diff --git a/base-64/index.d.ts b/base-64/index.d.ts
new file mode 100644
index 0000000000..3d6fd885d2
--- /dev/null
+++ b/base-64/index.d.ts
@@ -0,0 +1,25 @@
+// Type definitions for base-64 0.1
+// Project: https://github.com/mathiasbynens/base64
+// Definitions by: Dolan Miu <https://github.com/dolanmiu>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+export const version: string;
+
+/**
+ * This function takes a byte string (the input parameter) and encodes it according to base64. 
+ * The input data must be in the form of a string containing only characters 
+ * in the range from U+0000 to U+00FF, each representing a binary byte with values 0x00 to 0xFF. 
+ * The base64.encode() function is designed to be fully compatible 
+ * with btoa() as described in the HTML Standard.
+ * see: https://html.spec.whatwg.org/multipage/webappapis.html#dom-windowbase64-btoa
+ */
+export function encode(input: string): string;
+/**
+ * This function takes a base64-encoded string (the input parameter) and decodes it. 
+ * The return value is in the form of a string containing only characters in 
+ * the range from U+0000 to U+00FF, each representing a binary byte with values 0x00 to 0xFF. 
+ * The base64.decode() function is designed to be fully compatible 
+ * with atob() as described in the HTML Standard.
+ * see: https://html.spec.whatwg.org/multipage/webappapis.html#dom-windowbase64-atob
+ */
+export function decode(input: string): string;
\ No newline at end of file
diff --git a/base-64/tsconfig.json b/base-64/tsconfig.json
new file mode 100644
index 0000000000..e12b07da98
--- /dev/null
+++ b/base-64/tsconfig.json
@@ -0,0 +1,19 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "target": "es6",
+        "noImplicitAny": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "base-64-tests.ts"
+    ]
+}
\ No newline at end of file
diff --git a/base-64/tslint.json b/base-64/tslint.json
new file mode 100644
index 0000000000..2221e40e4a
--- /dev/null
+++ b/base-64/tslint.json
@@ -0,0 +1 @@
+{ "extends": "../tslint.json" }
\ No newline at end of file