diff --git a/xlsx/xlsx-tests.ts b/xlsx/xlsx-tests.ts
new file mode 100644
index 000000000..7a4054626
--- /dev/null
+++ b/xlsx/xlsx-tests.ts
@@ -0,0 +1,26 @@
+/// <reference path="./xlsx.d.ts" />
+import xlsx = require('xlsx');
+
+var options:xlsx.IParsingOptions = {
+    cellDates:true
+};
+
+var workbook = xlsx.readFile('test.xlsx', options);
+var otherworkbook = xlsx.readFile('test.xlsx', {type: 'file'});
+
+console.log(workbook.Props.Author);
+
+var firstsheet:string = workbook.SheetNames[0];
+
+var firstworksheet = workbook.Sheets[firstsheet];
+
+console.log(firstworksheet["A1"]);
+
+interface tester {
+    name:string;
+    age: number;
+}
+
+var jsonvalues:tester[] = xlsx.utils.sheet_to_json<tester>(firstworksheet);
+var csv = xlsx.utils.sheet_to_csv(firstworksheet);
+var formulae = xlsx.utils.sheet_to_formulae(firstworksheet);
diff --git a/xlsx/xlsx.d.ts b/xlsx/xlsx.d.ts
new file mode 100644
index 000000000..16df800dd
--- /dev/null
+++ b/xlsx/xlsx.d.ts
@@ -0,0 +1,136 @@
+// Type definitions for xlsx
+// Project: https://github.com/SheetJS/js-xlsx
+// Definitions by: themauveavenger <https://github.com/themauveavenger/>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+declare module 'xlsx' {
+
+    export function readFile(filename:string, opts?:IParsingOptions):IWorkBook;
+    export function read(data:any, opts?:IParsingOptions):IWorkBook;
+    export var utils:IUtils;
+
+    export interface IProperties {
+        LastAuthor?:string
+        Author?:string;
+        CreatedDate?:Date;
+        ModifiedDate?:Date
+        Application?:string;
+        AppVersion?:string;
+        Company?:string;
+        DocSecurity?:string;
+        Manager?:string;
+        HyperlinksChanged?: boolean;
+        SharedDoc?:boolean;
+        LinksUpToDate?:boolean;
+        ScaleCrop?:boolean;
+        Worksheets?:number;
+        SheetNames?:string[];
+    }
+
+    export interface IParsingOptions {
+        cellFormula?:boolean;
+        cellHTML?:boolean;
+        cellNF?:boolean;
+        cellStyles?:boolean;
+        cellDates?:boolean;
+        sheetStubs?:boolean;
+        sheetRows?:number;
+        bookDeps?:boolean;
+        bookFiles?:boolean;
+        bookProps?:boolean;
+        bookSheets?:boolean;
+        bookVBA?:boolean;
+        password?:string;
+
+        /**
+         * Possible options: 'binary', 'base64', 'buffer', 'file'
+         */
+        type?:string;
+    }
+
+    export interface IWorkBook {
+        /**
+         * A dictionary of the worksheets in the workbook.
+         * Use SheetNames to reference these.
+         */
+        Sheets:{[sheet:string]:IWorkSheet};
+
+        /**
+         * ordered list of the sheet names in the workbook
+         */
+        SheetNames:string[];
+
+        /**
+         * an object storing the standard properties. wb.Custprops stores custom properties.
+         * Since the XLS standard properties deviate from the XLSX standard, XLS parsing stores core properties in both places.
+         */
+        Props:IProperties;
+    }
+
+    /**
+     * object representing the worksheet
+     */
+    export interface IWorkSheet {
+        [cell:string]:IWorkSheetCell;
+    }
+
+    export interface IWorkSheetCell {
+        /**
+         * The Excel Data Type of the cell.
+         * b Boolean, n Number, e error, s String, d Date
+         */
+        t: string;
+
+        /**
+         * The raw value of the cell.
+         */
+        v: string;
+
+        /**
+         * rich text encoding (if applicable)
+         */
+        r?: string;
+
+        /**
+         * HTML rendering of the rich text (if applicable)
+         */
+        h?: string;
+
+        /**
+         * formatted text (if applicable)
+         */
+        w?: string;
+
+        /**
+         * cell formula (if applicable)
+         */
+        f?: string;
+
+        /**
+         * comments associated with the cell **
+         */
+        c?: string;
+
+        /**
+         * number format string associated with the cell (if requested)
+         */
+        z?: string;
+
+        /**
+         * cell hyperlink object (.Target holds link, .tooltip is tooltip)
+         */
+        l?: string;
+
+        /**
+         * the style/theme of the cell (if applicable)
+         */
+        s?: string;
+    }
+
+    export interface IUtils {
+        sheet_to_json<T>(worksheet:IWorkSheet|IWorkBook):T[];
+        sheet_to_csv(worksheet:IWorkSheet):any;
+        sheet_to_formulae(worksheet:IWorkSheet):any;
+    }
+
+}