diff --git a/types/atob/atob-tests.ts b/types/atob/atob-tests.ts
new file mode 100644
index 0000000000..e2e2618387
--- /dev/null
+++ b/types/atob/atob-tests.ts
@@ -0,0 +1,3 @@
+import atob from 'atob';
+
+atob('foo');
diff --git a/types/atob/index.d.ts b/types/atob/index.d.ts
new file mode 100644
index 0000000000..632880f7a6
--- /dev/null
+++ b/types/atob/index.d.ts
@@ -0,0 +1,7 @@
+// Type definitions for atob 2.1
+// Project: https://git.coolaj86.com/coolaj86/atob.js.git
+// Definitions by: John Wright <https://github.com/johngeorgewright>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.8
+
+export default function(str: string): string;
diff --git a/types/atob/tsconfig.json b/types/atob/tsconfig.json
new file mode 100644
index 0000000000..70dd7f0fdc
--- /dev/null
+++ b/types/atob/tsconfig.json
@@ -0,0 +1,21 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "lib": ["es6"],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "atob-tests.ts"
+    ]
+}
diff --git a/types/atob/tslint.json b/types/atob/tslint.json
new file mode 100644
index 0000000000..f93cf8562a
--- /dev/null
+++ b/types/atob/tslint.json
@@ -0,0 +1,3 @@
+{
+    "extends": "dtslint/dt.json"
+}
diff --git a/types/btoa/btoa-tests.ts b/types/btoa/btoa-tests.ts
new file mode 100644
index 0000000000..d09cdad23a
--- /dev/null
+++ b/types/btoa/btoa-tests.ts
@@ -0,0 +1,3 @@
+import btoa from 'btoa';
+
+btoa('foo');
diff --git a/types/btoa/index.d.ts b/types/btoa/index.d.ts
new file mode 100644
index 0000000000..cc311ed836
--- /dev/null
+++ b/types/btoa/index.d.ts
@@ -0,0 +1,7 @@
+// Type definitions for btoa 1.2
+// Project: https://git.coolaj86.com/coolaj86/btoa.js
+// Definitions by: John Wright <https://github.com/johngeorgewright>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.8
+
+export default function(str: string): string;
diff --git a/types/btoa/tsconfig.json b/types/btoa/tsconfig.json
new file mode 100644
index 0000000000..da4e373e68
--- /dev/null
+++ b/types/btoa/tsconfig.json
@@ -0,0 +1,21 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "lib": ["es6"],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "btoa-tests.ts"
+    ]
+}
diff --git a/types/btoa/tslint.json b/types/btoa/tslint.json
new file mode 100644
index 0000000000..f93cf8562a
--- /dev/null
+++ b/types/btoa/tslint.json
@@ -0,0 +1,3 @@
+{
+    "extends": "dtslint/dt.json"
+}