diff --git a/osmtogeojson/osmtogeojson-tests.ts b/osmtogeojson/osmtogeojson-tests.ts
new file mode 100644
index 000000000..3bb83c100
--- /dev/null
+++ b/osmtogeojson/osmtogeojson-tests.ts
@@ -0,0 +1,94 @@
+/// <reference path="osmtogeojson.d.ts" />
+
+import osmtogeojson from 'osmtogeojson';
+import {OsmJSON, GeoJSON} from 'osmtogeojson';
+
+let xml: Document = (new DOMParser()).parseFromString("<osm><node id='1' lat='1.234' lon='4.321' /></osm>", 'text/xml');
+let geojson: GeoJSON.FeatureCollection = {
+  type: "FeatureCollection",
+  features: [
+    {
+      type: "Feature",
+      id: "node/1",
+      properties: {
+        type: "node",
+        id: 1,
+        tags: {},
+        relations: [],
+        meta: {}
+      },
+      geometry: {
+        type: "Point",
+        coordinates: [4.321, 1.234]
+      }
+    }
+  ]
+};
+
+osmtogeojson.toGeojson(xml);
+osmtogeojson(xml, {
+  flatProperties: true,
+  uninterestingTags: {foo:true}
+});
+
+let json: OsmJSON.Root = {
+  elements: [
+    {
+      type: "node",
+      id:   1,
+      lat:  1.234,
+      lon:  4.321,
+      timestamp: "2013-01-13T22:56:07Z",
+      version:   7,
+      changeset: 1234,
+      user:      "johndoe",
+      uid:       666
+    },
+    {
+      type: "relation",
+      tags: {"type": "multipolygon"},
+      id:   1,
+      members: [
+        {
+          type: "way",
+          ref:  2,
+          role: "outer"
+        },
+        {
+          type: "way",
+          ref:  3,
+          role: "outer"
+        }
+      ]
+    },
+    {
+      type: "way",
+      id:   2,
+      nodes: [4,5,6,4]
+    },
+    {
+      type: "node",
+      id:   4,
+      lat:  0.0,
+      lon:  0.0
+    },
+    {
+      type: "node",
+      id:   5,
+      lat:  0.0,
+      lon:  1.0
+    },
+    {
+      type: "node",
+      id:   6,
+      lat:  1.0,
+      lon:  0.0
+    }
+  ]
+};
+
+osmtogeojson.toGeojson(json);
+osmtogeojson(json, {
+  flatProperties: true,
+  uninterestingTags: {foo:true}
+});
diff --git a/osmtogeojson/osmtogeojson.d.ts b/osmtogeojson/osmtogeojson.d.ts
new file mode 100644
index 000000000..0edee3509
--- /dev/null
+++ b/osmtogeojson/osmtogeojson.d.ts
@@ -0,0 +1,96 @@
+// Type definitions for osmtogeojson 2.2.5
+// Project: https://github.com/tyrasd/osmtogeojson.git
+// Definitions by: Qubo <https://github.com/tkqubo>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+declare module "osmtogeojson" {
+  export interface OsmToGeoJSON {
+    (data: Document|OsmJSON.Root, options?: Options): GeoJSON.GeoJSONObject;
+    toGeojson(data: Document|OsmJSON.Root, options?: Options): GeoJSON.GeoJSONObject;
+  }
+
+  export interface Options {
+    verbose?: boolean;
+    /**
+     * If true, the resulting GeoJSON feature's properties will be a simple key-value list instead of a structured json object (with separate tags and metadata). default: false
+     */
+    flatProperties?: boolean;
+    /**
+     * Either a blacklist of tag keys or a callback function. Will be used to decide if a feature is interesting enough for its own GeoJSON feature.
+     */
+    uninterestingTags?: { [tag: string]: boolean; }|Function; //TODO: type function
+    /**
+     * Either a json object or callback function that is used to determine if a closed way should be treated as a Polygon or LineString.
+     */
+    polygonFeatures?: any|Function; //TODO: type this
+  }
+
+  export namespace GeoJSON {
+    export interface GeoJSONObject {
+      type: string;
+    }
+
+    export interface Feature extends GeoJSONObject {
+      id?: string;
+      geometry: Geometry;
+      properties: any; //TODO: type this
+    }
+
+    export interface FeatureCollection extends GeoJSONObject {
+      features: Feature[];
+    }
+
+    export interface Geometry extends GeoJSONObject {
+      coordinates: Coordinate|Coordinate[]|Coordinate[][];
+    }
+
+    export interface GeometryCollection extends GeoJSONObject {
+      geometries: Geometry[];
+    }
+
+    export type Coordinate2d = [number, number];
+    export type Coordinate3d = [number, number, number];
+    export type Coordinate = Coordinate2d|Coordinate3d;
+  }
+
+  export namespace OsmJSON {
+    export interface Root {
+      elements: (Node|Way|Relationship)[];
+    }
+
+    export interface OsmJSONObject {
+      type: string;
+      id: number;
+      tags?: { [name: string]: string; }
+      timestamp?: string;
+      version?: number;
+      changeset?: number;
+      user?: string;
+      uid?: number;
+    }
+
+    export interface Node extends OsmJSONObject {
+      lat: number;
+      lon: number;
+    }
+
+    export interface Way extends OsmJSONObject {
+      nodes: number[];
+    }
+
+    export interface Relationship extends OsmJSONObject {
+      members: Member[];
+    }
+
+    export interface Member {
+      type: string;
+      ref: number;
+      role: string;
+    }
+  }
+
+  var osmtogeojson: OsmToGeoJSON;
+
+  export default osmtogeojson;
+}
+