diff --git a/types/convert-string/convert-string-tests.ts b/types/convert-string/convert-string-tests.ts
new file mode 100644
index 0000000000..1a7403761a
--- /dev/null
+++ b/types/convert-string/convert-string-tests.ts
@@ -0,0 +1,7 @@
+import { convertString } from "convert-string";
+
+const utf8Bytes = convertString.UTF8.stringToBytes("Test ♥");
+const utf8Message = convertString.UTF8.bytesToString(utf8Bytes);
+
+const bytes = convertString.stringToBytes("Hello");
+const message = convertString.bytesToString(bytes);
diff --git a/types/convert-string/index.d.ts b/types/convert-string/index.d.ts
new file mode 100644
index 0000000000..be5bb4438e
--- /dev/null
+++ b/types/convert-string/index.d.ts
@@ -0,0 +1,14 @@
+// Type definitions for convert-string 0.1
+// Project: https://github.com/baz/foo (Does not have to be to GitHub, but prefer linking to a source code repository rather than to a project website.)
+// Definitions by: Haseeb Majid <https://github.com/hmajid2301>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+export namespace convertString {
+    function stringToBytes(str: string): number[];
+    function bytesToString(bytes: number[]): string;
+
+    namespace UTF8 {
+        function stringToBytes(str: string): number[];
+        function bytesToString(bytes: number[]): string;
+    }
+}
diff --git a/types/convert-string/tsconfig.json b/types/convert-string/tsconfig.json
new file mode 100644
index 0000000000..9e64007203
--- /dev/null
+++ b/types/convert-string/tsconfig.json
@@ -0,0 +1,16 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": ["es6"],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": ["../"],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": ["index.d.ts", "convert-string-tests.ts"]
+}
diff --git a/types/convert-string/tslint.json b/types/convert-string/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/convert-string/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }