00_intro.md

# [SheetJS js-xlsx](http://sheetjs.com)

Parser and writer for various spreadsheet formats.  Pure-JS cleanroom
implementation from official specifications, related documents, and test files.
Emphasis on parsing and writing robustness, cross-format feature compatibility
with a unified JS representation, and ES3/ES5 browser compatibility back to IE6.

This is the community version.  We also offer a pro version with performance
enhancements, additional features by request, and dedicated support.


[**Pro Version**](http://sheetjs.com/pro)

[**Commercial Support**](http://sheetjs.com/support)

[**Rendered Documentation**](https://sheetjs.gitbooks.io/docs/)

[**In-Browser Demos**](http://sheetjs.com/demos)

[**Source Code**](http://git.io/xlsx)

[**Issues and Bug Reports**](https://github.com/sheetjs/js-xlsx/issues)

[**Other General Support Issues**](https://discourse.sheetjs.com)

[**File format support for known spreadsheet data formats:**](#file-formats)

<details>
	<summary><b>Graph of supported formats</b> (click to show)</summary>

![circo graph of format support](formats.png)

![graph legend](legend.png)

</details>

[**Browser Test**](http://oss.sheetjs.com/js-xlsx/tests/)

[![Build Status](https://saucelabs.com/browser-matrix/sheetjs.svg)](https://saucelabs.com/u/sheetjs)

[![Build Status](https://travis-ci.org/SheetJS/js-xlsx.svg?branch=master)](https://travis-ci.org/SheetJS/js-xlsx)
[![Build Status](https://semaphoreci.com/api/v1/sheetjs/js-xlsx/branches/master/shields_badge.svg)](https://semaphoreci.com/sheetjs/js-xlsx)
[![Coverage Status](http://img.shields.io/coveralls/SheetJS/js-xlsx/master.svg)](https://coveralls.io/r/SheetJS/js-xlsx?branch=master)
[![Dependencies Status](https://david-dm.org/sheetjs/js-xlsx/status.svg)](https://david-dm.org/sheetjs/js-xlsx)
[![NPM Downloads](https://img.shields.io/npm/dt/xlsx.svg)](https://npmjs.org/package/xlsx)
[![ghit.me](https://ghit.me/badge.svg?repo=sheetjs/js-xlsx)](https://ghit.me/repo/sheetjs/js-xlsx)
[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)