diff --git a/javascript/index.d.ts b/javascript/index.d.ts
new file mode 100644
index 0000000..c29fe83
--- /dev/null
+++ b/javascript/index.d.ts
@@ -0,0 +1,3 @@
+export function parse(text: string): object;
+export function dump(obj: object, pretty?: boolean): string;
+export function stringify(obj: object, pretty?: boolean): string;