KeeWeb is a free and open-source password manager compatible with KeePass, available as a web version and desktop apps. The underlying file format is KDBX (KeePass database file). KeeWeb was praised by Ghacks Technology News in 2016 as “brand-new” fixing the “shortcoming of a web-based version” of KeePass, and by Tech Advisor in 2020 as “well-designed cross-platform password manager”.

It is written in JavaScript and makes use of WebCrypto and WebAssembly to work with password files directly in browser, without uploading them to a server. It can synchronize files with popular file hosting services, such as Dropbox, Google Drive or OneDrive.