Demo version of Kernel for OST to PST software is absolutely free. To download free OST PST tool, visit Kernel’s official website and click the ‘Download’ button. Demo version is fully functional and allows you to recover corrupt or damaged OST files. You can also save 25 items from each recovered folder. However, to save more number of items, you need to purchase the software. For getting the software, you can pay through various payment modes.