AuthPass is an open-source, GPL-3.0-licensed password manager built with Flutter and Dart that opens KeePass 2.x KDBX databases on mobile, desktop, and web, intended for people who want their credentials in a portable file they control rather than in a vendor-hosted vault.

What it is

AuthPass is a Flutter application written in Dart and released under GPL-3.0 that serves as a KeePass 2.x compatible password manager. It carries 2,791 stars, 282 forks, and 167 open issues, with the last push on 15 September 2026. It lives in the Flutter ecosystem and targets Android, iOS, macOS, Windows, Linux, and the browser, with topics covering android, ios, debian, flutter-apps, kdbx, and kdbx4. It reads and decrypts KDBX 3.x files using a password or a keyfile, parses the decrypted XML, handles protected values, edits existing entries, saves changes into the KDBX file, and creates new KDBX files.

The concrete problem it solves is that KeePass 2.x databases are portable but have traditionally required platform-specific desktop clients to open. AuthPass replaces that single-platform client requirement with one Flutter codebase running on phones, desktops, and the web, so the same KDBX file opens on an iPhone, an Android device, a Mac, a Windows PC, or a Linux desktop. It can also download a KDBX file through a URL, removing the need to move the database manually before the first unlock, and because the file stays in KeePass format the project requires no migration step or proprietary vault.

Key capabilities

• Reads KeePass 2.x KDBX databases, with the README roadmap marking KDBX 3.x decryption by password as complete.
• Unlocks with a password or a keyfile, parses the decrypted XML, and handles protected values.
• Downloads KDBX files through a URL.
• Lists, searches, and shows password entries, with mobile copy actions for usernames and passwords.
• Integrates mobile biometrics, including fingerprint unlock.
• Distributes through the Mac App Store, Google Play Store, Apple App Store, Microsoft Store, Snapcraft, Flathub flatpak app.authpass.AuthPass, and the browser build at web.authpass.app.

Who uses it and how

• Individuals who already keep a KeePass 2.x KDBX database and want to open it on an iPhone or Android phone without moving to a hosted service.
• Linux desktop users who install from Snapcraft or the Flathub flatpak app.authpass.AuthPass.
• Windows desktop users who install from the Microsoft Store or follow the Windows installation guide.
• Mobile users who unlock with fingerprint biometrics and copy usernames and passwords from entry details.
• Contributors and translators, with topics including contributions-welcome, help-wanted, and hacktoberfest, and translation work through Crowdin at authpass.crowdin.com/authpass.

Getting started

Install from a platform store: the Mac App Store, Google Play Store, Apple App Store, Microsoft Store, Snapcraft, or the Flathub flatpak app.authpass.AuthPass, or use the browser build at https://web.authpass.app/. Prebuilt artifacts are also on the GitHub releases page at https://github.com/authpass/authpass/releases, and Windows users can follow the Windows installation guide.

How it compares

No list of paid products that AuthPass replaces is provided in the facts, and the facts name no comparable password managers. AuthPass therefore stands alone in this registry, described only by its own KeePass 2.x compatibility, Flutter implementation, and GPL-3.0 licence.

When to use it — and when not to

AuthPass is a client-side application, and the provided facts describe no database, storage service, or SMTP component that a self-hoster must operate. Users who need completed automatic syncing of KDBX files, macOS Auto-Type, or auto-lock after inactivity should note that those items remain unchecked on the README roadmap, and the project carries 167 open issues as of the last push on 15 September 2026. The README body states KeePass 2.x (KDBX 3.x) compatibility, while the repository tagline advertises KDBX 3 and KDBX 4, so anyone requiring confirmed KDBX 4 write support should verify that with the project before adopting it.