Check out Advik OST to Gmail Import Tool to import OST to Gmail. The software can directly upload OST files to Gmail without installing any external applications. It is secure solution that does not lose any single bit of data during the process. It can import multiple OST files at once.
Steps to Import OST to Gmail
1. Run this tool on your system.
2. Add OST files into software.
3. Choose required mailbox folders.
4. Select Gmail as a saving option.
5. Enter Gmail account login details and press Convert.
Done! That's how you can easily import OST files into Gmail account.