Sheetster is a web-based spreadsheet editor and viewer. It can import and export the XLS and XLSX file formats and nearly the full range of Excel formula functions are supported. Most basic features are implemented as well as some of the more advanced ones. The user interface is written entirely in JavaScript and its server-side API is pure Java based on the OpenXLS spreadsheet engine. Neither the client nor the server needs Excel or any browser plugins.

Sheetster is primarily intended for developers who want to integrate spreadsheets into their web applications. Towards that end it provides a server-side API for document storage connectors and a rich REST API for manipulating open spreadsheets. It can also be deployed stand-alone by a website administrator to provide spreadsheet editing with a rudimentary CMS.


  • Read write and edit Excel 2007/2010 file format
  • Export Spreadsheets to PDF
  • Supports Conditional Formatting
  • Supports Split Panes
  • Supports Realtime Multi-User Editing

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User Reviews

  • can i get the spreadsheet sourece code my email is i am very very Interesting about it thank you very much

  • Sheetster is a polished, highly functional Java spreadsheet server. With a beautiful, skinnable UI, secure REST api and Excel compatibility, this is a great spreadsheet and an even better web development tool. It is functional today, but not every Excel feature is supported -- yet. I am sure with the level of activity on this project, and the dedication of Extentech team, it will give Excel a run for its money.

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Additional Project Details



Intended Audience


User Interface


Programming Language

JavaScript, JSP, Java

Database Environment