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From your personal desktop to your business files, we've got you covered

We offer a range of tools, to help you convert your files in the most convenient way for you. As well as our online file conversion service, we also offer a desktop app for file conversions straight from your desktop, and an API for automated file conversions for developers. Which tool you use is up to you!

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Tools to suit your file conversion needs

You'll find all the conversion and compression tools you need, all in one place, at Zamzar. With over 1100 file-conversion types supported, whether you need to convert videos, audio, documents or images, you'll easily find what you need and soon have your files in the formats and sizing that work for you.

WKS Document Format

WKS Converter

WKS is the format that was used with the now-discontinued Lotus 1-2-3 spreadsheet software. In the 1980s and early 1990s, before Microsoft Excel overtook it in use, Lotus 1-2-3 was probably the most popular spreadsheet program. The software was widely used in both homes and offices. Like Excel formats, WKS stores data in cells in grids and rows, and you could use Lotus 1-2-3 to calculate formulas and create charts.

Lotus was sold to IBM and the final version of Lotus 1-2-3 was released in 2002, with support ending in 2013. Because it used to be such a common format, you can still open WKS files in many spreadsheet programs. These include Excel 2003 and earlier, Corel QuattroPro and OpenOffice Calc. However, many users prefer to convert WKS files into Excel or CSV, as the format and software have since been discontinued.

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XLS Document Format

XLS Converter

The XLS file format was developed by Microsoft for its Excel spreadsheet program. XLS is a binary spreadsheet format that can include cell data and formulas, as well as charts and macros. Excel is one of the most popular software programs for recording, organising, calculating and analysing data. It’s often used for budgeting and reporting.

Microsoft introduced the new XLSX format for Excel in 2007, to replace XLS. However, you can still open XLS files in newer versions of Excel, as well as saving XLSX files into this older format. Excel is part of Microsoft’s Office suite, which is available as a one-off software purchase or an Office 365 subscription. Other spreadsheet programs that can usually open XLS files include Google Sheets, Apple Numbers and LibreOffice Calc.

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How to convert a WKS to a XLS file?

  1. 1. Choose the WKS file that you want to convert.
  2. 2. Select XLS as the the format you want to convert your WKS file to.
  3. 3. Click "Convert" to convert your WKS file.

Convert from WKS

Using Zamzar, it is possible to convert WKS files to a variety of other formats: