What is .KDB file extension?
Database of passwords used by KeePass Password Safe, a free, open-source password management program; stores user passwords for a variety of logins, such as network logon, e-mail, FTP, websites, etc; passwords within the database can be sorted into groups for further organization.
KeePass Password Safe was originally developed for Windows, but has been ported to Linux and Mac OS X under the name "KeePassX."
You can see a list of software programs here on www.easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.