XLSM
The "M" of XLSM stands for macro. Macros are programs embedded in Office documents used to automate different tasks. Staring from Excel 2007, XLSX spreadsheets that contain macros are saved with the XLSM extension.
XLS
XLS is Microsoft Excel spreadsheet file that stores data and manipulates several mathematical operations. It uses a visual basic operation to implement several numeric functions. This spreadsheet file is supported by most of the open source or proprietary spreadsheet software.
+200 Formats Supported
CloudConvert is your universal app for file conversions. We support nearly all audio, video, document, ebook, archive, image, spreadsheet, and presentation formats. Plus, you can use our online tool without downloading any software.
Data Security
CloudConvert is ISO 27001 certified and has been trusted by our users and customers since its founding in 2012. No one except you will ever have access to your files. We earn money by selling access to our API, not by selling your data. Read more about that in our Security Overview.
High-Quality Conversions
Besides using open source software under the hood, we’ve partnered with various software vendors to provide the best possible results. Most conversion types can be adjusted to your needs such as setting the quality and many other options.
Powerful API
Our API allows custom integrations with your app. You pay only for what you actually use, and there are huge discounts for high-volume customers. We provide a lot of handy features such as full Amazon S3 integration. Check out the CloudConvert API.