As we all know, data is a crucial thing that we don’t want to lose it. Our Outlook OST file contains our lots of data so it’s important to have a OST viewer tool that allows you to access your files even without installation of Outlook email client. You can open OST file anytime without any hesitation. And here’s come the interesting part, It is completely free with this unique feature. You can consider this tool as your daily driver for your Outlook need as it cost you nothing.