diff --git a/types/level-codec/index.d.ts b/types/level-codec/index.d.ts
new file mode 100644
index 0000000000..a106350215
--- /dev/null
+++ b/types/level-codec/index.d.ts
@@ -0,0 +1,32 @@
+// Type definitions for level-codec 9.0
+// Project: https://github.com/Level/codec
+// Definitions by: Daniel Byrne <https://github.com/danwbyrne>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+export interface CodecEncoder {
+    encode: (val: any) => any;
+    decode: (val: any) => any;
+    buffer: boolean;
+    type: string;
+}
+export interface CodecOptions {
+    keyEncoding?: string | CodecEncoder;
+    valueEncoding?: string | CodecEncoder;
+}
+export interface Codec {
+    encodeKey(key: any, opts?: CodecOptions, batchOpts?: CodecOptions): any;
+    encodeValue(value: any, opts?: CodecOptions, batchOpts?: CodecOptions): any;
+    decodeKey(key: any, opts?: CodecOptions): any;
+    decodeValue(value: any, opts?: CodecOptions): any;
+    encodeBatch(ops: any, opts?: CodecOptions): any;
+    encodeLtgt(ltgt: any): any;
+    createStreamDecoder(opts: CodecOptions): any;
+    keyAsBuffer(opts?: CodecOptions): any;
+    valueAsBuffer(opts?: CodecOptions): any;
+}
+export interface CodecConstructor {
+    new (options?: CodecOptions): Codec;
+    (options?: CodecOptions): Codec;
+}
+
+export const Codec: CodecConstructor;
diff --git a/types/level-codec/level-codec-tests.ts b/types/level-codec/level-codec-tests.ts
new file mode 100644
index 0000000000..371966844f
--- /dev/null
+++ b/types/level-codec/level-codec-tests.ts
@@ -0,0 +1,12 @@
+import { Codec } from "level-codec";
+
+const test = (codec: Codec) => {
+    return codec.keyAsBuffer();
+};
+
+test(new Codec({ keyEncoding: "hex" }));
+test(new Codec());
+
+// new not needed
+test(Codec({ keyEncoding: "hex" }));
+test(Codec());
diff --git a/types/level-codec/tsconfig.json b/types/level-codec/tsconfig.json
new file mode 100644
index 0000000000..0381e4eb12
--- /dev/null
+++ b/types/level-codec/tsconfig.json
@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "level-codec-tests.ts"
+    ]
+}
diff --git a/types/level-codec/tslint.json b/types/level-codec/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/level-codec/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }