The SpreadsheetConverter add-on to Microsoft Excel lets you automatically convert Excel spreadsheets to live web pages, with all calculations performed by separate server components running in the Internet Information Server (IIS) on any Windows server.

Let a business expert create a calculator or web form as an Excel spreadsheet including all necessary formulas. Then let SpreadsheetConverter generate the ASPX- or classic ASP-page. When a field on the page is changed, all other fields are automatically recalculated, just like in Excel but running on a server.

Either use the page as it is or open it in Visual Studio for further processing. You can add back-end integration, for example for saving and restoring values to a database. It’s like a server version of Excel, with a web interface.

While the user moves on to edit the next field in the form, the server dynamically instructs the browser to update any fields or charts that were affected by the previous data entry. This enables the browser to provide automatic background recalculation, while still fully exploiting the remote ASP.NET server.

Now you can run Excel on your own server. Just convert your spreadsheets for ASP.NET.

See examples of what SpreadsheetConverter can do for you.

Free offer: Send us a spreadsheet and we’ll send it back as a web page.



It’s so easy, you can do it yourself!

SpreadsheetConverter ASP.NET lets you connect your website to internal IT resources behind the firewall. Visualize complex information in attractive charts. Build a calculator that fetches daily interest rates from a database. Collect external data from web forms and store it in a secure database.


Online spreadsheets make your web professional

A time-saving calculator makes your web site stand out from the competition. It’s so easy to put any existing form or calculator on the web: expense reports, surveys, quote generators, order forms, reservation forms, employment applications, financial calculators, engineering tools – the list is endless.

We’re not only talking simple plus-and-minus spreadsheets here, we’re talking

  • a responsive calculator design that automatically adapts to both the widest and most narrow screens
  • all the graphical user interface widgets you could ask for, in colorful themes
  • live charts that automatically update when values are changed
  • live team collaboration with worksheets shared over the Internet in real-time
  • step-by-step wizards for complex forms
  • smart table lookup, complex data validation, interactive menus

The free form-to-Inbox service requires no installation, no programming skills and no configuration. Once you upload your first web form to your server, submitted forms start arriving at your Inbox. You are up and running within minutes. For a small monthly fee, we store submitted forms in a database for you until you visit our server to pick them up.

Features and benefits

SpreadsheetConverter is the perfect tool for creating calculating web forms and web pages that attract attention.

  • It’s easy even for non-programmers: SpreadsheetConverter turns your business users’ Microsoft Excel spreadsheets into scalable ASP.NET or classic ASP applications.
  • The formulas are protected: All calculations are done on the server, so your formulas are invisible to the user.
  • It’s so easy to change: Just change the spreadsheet and re-run the conversion, and you can open the resulting ASP.NET file directly.
  • The response is instantaneous: The browser can communicate each little change separately to the server in the background with asynchronous JavaScript and XML (AJAX).
  • Everything is live and interacting with your visitors: The calculator or form updates dynamically when values are changed. Even the charts are live! Use calendars to select dates, stars to set ratings and sliders to vary data in real-time. Create forms with dropdown menus, checkboxes, radio buttons, large text fields, list boxes in a breeze. Design step-by-step wizards for complex forms.
  • It looks so good on the web: Normally, it takes a lot of time to make a web page look this well-designed. With Excel you just format the page the way you like. SpreadsheetConverter creates a web page that looks the same: borders, colors, fonts, checkboxes, dropdown lists etc work as they should, and numbers are formatted on the fly with decimals, thousand separators and currency symbols. Play with new layouts inside Excel before you convert them to web format, which saves lots of time (besides being lots of fun). Use graphical themes to give all your calculators a common look.
  • Use if with any kind of device: fluid responsive blocks automatically fit any screen, both your handheld devices and your desktop screen.
  • Two or more team members can share the same spreadsheet: collaborate with your colleagues in real-time to create and analyze calculating forms and web pages.
  • Automatic form-to-Inbox delivery: When users submit completed forms, SpreadsheetConverter delivers them directly to your e-mail Inbox. For a small fee, forms can be saved in a database for later retrieval, thanks to a hosted service that requires no local installation or server.
  • It’s so easy to change: Business rules frequently change, e.g. new prices, new discount options, new regulations etc. With hand-crafted web pages it’s hard to keep up with the frequent changes. With SpreadsheetConverter, you just change the spreadsheet, and regenerate the web page.
  • You get the source code: The ASP.NET server code is nicely formatted and completely self-contained. There are no library files or other external requirements.
  • Integrate it with your own design: Use the web page as it is or open it in Visual Studio for further processing. You can add back-end integration, for example for saving and restoring values to a database. The ASP.NET-page can either be standalone or part of a larger application.
  • There are no errors: The calculator doesn’t need any testing, since thousands of users already have tested our calculation engine.
  • It’s cost-effective: You need the SpreadsheetConverter program only when you perform the actual conversion from spreadsheet to web page format. You need one license for each PC on which you install the program to perform such conversions.
  • Excel isn’t needed: Once the web page is created, Excel is not required. Your web server doesn’t need Excel, and your users don’t need Excel. Even if Excel is all around, not all employees have it, and private persons seldom have it.
  • It’s free to distribute: With the Professional Edition, you can make the calculator part of a product that you sell.
  • You take no risk: Every purchase comes with a 30-day money-back guarantee and six months of free e-mail support.

Spreadsheets are safe behind ASP.Net

With the ASP.NET version of SpreadsheetConverter, a portion of the web page resides on a Windows server behind the corporate firewall. This makes it much easier to fetch data from a secure database, e.g. the current interest rate, or interact with other server applications. All the sensitive formulas and business rules in the spreadsheet are also inaccessible behind the firewall.

All calculations are performed securely on the server by separate ASP.NET or classic ASP modules, freeing the browser from the workload required to do all the computations. This enables the browser to handle complex user interface logic even for very large web pages.

To maintain rapid response times, SpreadsheetConverter uses state-of-the-art Ajax technology to recalculate only the cells affected by each change. The spreadsheet is then silently updated while the user moves on to another cell.

Fast calculation with prefabricated components

Creating a calculating web page like an expense report or order form online can be very difficult. Programming, testing and debugging takes a lot of time even for a specialist. Most online calculators do all their calculation on the web server, which can make the web page slow because of all the network communication with the server.

With SpreadsheetConverter, all your spreadsheet formulas are automatically converted into program code by SpreadsheetConverter, using prefabricated components that have been meticulously tested. The conversion to web format retains the interactivity that is typical of a spreadsheet, and the entire visual layout is carried over to the web page.

Our basic product converts Excel spreadsheets to HTML with embedded JavaScript that can be used with any web server. All calculations are performed in the browser, without any help from the web server. SpreadsheetConverter can also generate HTML5 web applications for iPhone and Android smartphones. This makes it easy to collect data with mobile devices, select or configure products or do spreadsheet calculations in a smartphone.

Special server products generate program code for Node.js, ASP.NET and classic ASP web servers. Since these flavors keep the formulas on the server and perform all calculations there, the business formulas are hidden from the end user. Running the formulas on the server also makes it much easier to add back-end integration, for example for saving and restoring values to a database. Communication with the server is minimal and the web calculator updates itself quietly in the background while the user is busy entering data into another cell.

  • I have been a long-time user of ExcelEverywhere and SpreadsheetConverter and have frequently had issues, made suggestions etc. All have been resolved satisfactorily. However, I have to say version 8 is absolutely brilliant and unlike in the past there is no "but ..."! With a bit of imagination there is virtually nothing that can't be delivered using it. Well done to all and thanks.

    Harvey Bell of 

  • SSC7 is AWESOME! I am very happy about the show/hide rows or sheets - that's an incredible development for me.

    Peter Cox, QuickCalc Development

  • This program was a great find for us. Eliminated plenty of money developing custom website as I do this all myself. Plus it has such great features and flexibility, customers love the interface.

    Anthony M, Nesconset, NY

  • I just thought you might like to see what I did with your converter. What a fantastic product! I have been able to add another dimension to my blog with this.

    Martin Ramsey,, Bishopton, United Kingdom

  • Bingo! That did the trick. I love this product and appreciate your help in resolving my problem. Sorry for my lack of computer knowledge. Satisfied customeer, will recommend it to friends.

    Gary, Ville Platte, LA

  • "We have been using the software and it is an absolute pleasure to use. I have now subscribed to and paid for the Professional HTML version and it is working perfectly.

    Peter Strydom, 4sight, Durban, South Africa

  • Thank you. Just to let you know that is a terrific product, I received some compliments from my graphics and website designers; we use the converter for a unique concept.

    Tony, Long Island, NY

  • I thought you might like to see this - I am so happy to have been able to do this kind of thing. Thanks!

    Andrew, Standards Of Life P.S. Works on iPad too!

  • Thank you very much! Your product is the absolute best!

  • Your HTML product exceeded my expectations! With your permission, I'd like to list you on my site as a recommended link.

    Anthony C Gruber, CPA,

  • Thanks a lot, it is a great application.


  • I used your software to create a complex earnings calculator for my website. My website management company was so impressed, they asked me to write an article about using your product for their subscriber newsletter.


  • Everything worked so well that we bought the software.

    Herman Ka’imiloa Marciel,, Kailua, Hawaii

  • What a great program! I am certainly not a web expert, but your software impressed my staff, and made me look like I know what I'm doing! I purchased the software and easily installed the form in my webpage in less than an hour. I cannot begin to tell you how happy I am with the results!

    Rebecca J. Jensen, CPA, The Accounting Source, Spokane, WA

  • Thank you very much...this will save a lot of headaches and make me look good.

    Rob C

  • The only problem I see is everyone inundating me with spreadsheets they'll want created for our site!

    Helen E. Logan, USA

  • That is exactly what I was looking for, you and your program have saved me an amazing amount of time.

    Ken Rowland, USA

  • I've tried this product and it is amazing! It really helps a lot to control our presentations of Excel on the web, especially for customers and business associates.

    Fernando Procel, Ecuador

  • What you guys have developed here is a goldmine.

    Christopher Jones

Superior support

We guarantee the best support. Six months of e-mail support is included in the price for all products. We promise answers by the next business day, but within an hour is our goal.

SpreadsheetConverter is a mature product that has been for sale since 2002. We constantly add new value to the product. Updates are free within the same major version, so if you buy any version 8 product, all 8.x updates are free. If we release a new major version within six months from your purchase, the upgrade to the new version will not cost you anything.

  • I just wanted to drop you a line and say that I am delighted with the way you respond so quickly to support questions!


  • Bingo! That did the trick. I love this product and appreciate your help in resolving my problem. Sorry for my lack of computer knowledge. Satisfied customeer, will recommend it to friends.

    Gary, Ville Platte, LA

  • Thank you for the prompt replies - excellent support, very refreshing.

    Rob V

  • I got lots of pre-sales help from Anna Winter, and the support I got made the purchasing decision dead easy - you are a great company to deal with. Many thanks again.

    Brian Slater,

  • O my goodness this is awesome!!! Perfect that is exactly what I needed!! Thank you all so much for all of your help!!!!

    Lora Ferrer

  • Thank you for being so responsive. The speadsheet works great!

    Jerry Covington, Web hosting and web design

  • I just purchased the product. Thank you very much for the support. This product is going to be a life saver for me.

    Connie Pettie,, Edison, NJ

  • I really like SpreadsheetConverter and your VERY quick response so ordered full license today.


  • Thx! U rock!


  • Your tech support has to be one of the top 3 in the world. Thank you again for creating this wonderful program and for the support and quick answers to my problems.

    Joel Rizzo,

  • I am absolutely amazed at the speed of your response. Thank you very much. Your product is outstanding and your support is equal to the product.

    Alan Milner

  • The support your company provides is fantastic.

    Darren, Webhosting company

  • And did I mention your customer support? You have responded to my questions promptly.

    Matt Silverman,, Concord MA

  • You guys ROCK! I checked the formulas several time and didn't catch that! I'm very impressed with your talent and fast response and service. Thank you!


  • Thanks for all the great information; it is obvious you wish to assist others in having successful Web products, and your expertise is much appreciated.

    Donnie Johnson

  • WOW, You're good. Thanks for the quick reply.


Low cost, no risk

We recommend that you start with the Standard edition of SpreadsheetConverter HTML to learn the basics. As you become confident in your ability to generate web pages from Excel, you can add more “flavors” – technical publishing environments – to your toolset.

For serious publishing business, the Professional Edition lets you create web pages for clients, supports all the most nerdy Excel functions and provides even more beautiful chart types.

Here is the complete price list:

License to generate HTML pages$127$247
License to generate pages for iPhone/Android$167$327
License to generate pages for Node.js$187$357
License to generate pages for ASP.Net$187$357
License to generate pages for Flash (version 7 only)$187$357
Cost per page$0$0
Cost per server$0$0
Cost per visitor$0$0

Excel and SpreadsheetConverter are only used when you create the spreadsheet and convert it to web format. We charge a small one-time license fee for each computer on which you install the program to perform such conversions.

  • There are no additional fees per page or conversion.
  • There are no additional fees per web server, page view or visitor.
  • There are no additional fees for Excel or plug-ins. The web pages we create have everything in them and do not need or use Excel.

In fact, when spreadsheets are available online like this, many people no longer need their own Excel licenses, which can generate additional savings.


There is no risk, you’re safely protected by our 30-day money-back guarantee. If you are not satisfied with your purchase, just send us an e-mail, and we will cancel your purchase and refund the money.

  • I recently purchased your software and would like to tell you that it is incredibly useful for me.

    Paul S. E., Ph.D, Consulting Economist

  • I am very impressed with not only the software so far, but the clarity of the User's Guide and all the follow-up up help, such as this email. Very refreshing to see a company make the buyer feel welcome!

    Roger Smith, M&R Games

  • I think you may not be charging enough for it (I can say that now since I already paid for it).

    Christopher Jones

  • Thanks for developing such high-quality products and for selling them at a price that the small business community can afford.

    Anthony C Gruber, CPA,

  • I am so glad I found you guys and am also glad I bought your program. I will soon be upgrading the product to the next level.

    Joel Rizzo,

  • SpreadsheetConverter solved my problem in a few easy steps.

    Fred Pauwels, webmaster for

Let us convert a spreadsheet for you, right now!

Let us convert one of your Excel spreadsheets to a live web form or calculating web page. Just e-mail us one of your spreadsheets now and we’ll do it for you. It’s so simple, we’ll even do it for free! Once you see the impressive result, you’ll want to download the program and try for yourself.

Download and try the program for free for 30 days

You don’t need a license to test the program, just download the trial version and install it on your Windows computer. We recommend that you start with SpreadsheetConverter HTML. If you buy a license for one flavor and later want to upgrade to a different flavor, you only pay the price difference.

Technical requirements

SpreadsheetConverter normally doesn’t require anything special. If you have a reasonably current version of Excel running in a Windows PC, you’re probably good to go.

For an overview of the various flavors of SpreadsheetConverter and their exact technical requirements, please study the product comparison chart.

Build live website calculators and web forms now!

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Just download, install and test the Excel add-on now. Or let us convert a spreadsheet for you, for free.