Table of Contents
One of the most compelling advantages of the KeePass ecosystem is that your password database is never locked to a single application. Because the KDBX format is an open standard, dozens of apps across every major platform can read and write your vault. This means you choose the software that fits your workflow, your device, and your preferences – and you can switch at any time without losing a single entry.
This guide covers every significant application that works with KeePass databases, organized by platform, with honest assessments of features, limitations, and which app suits which kind of user. Whether you are setting up your first vault or migrating from a proprietary manager, this is the reference you need.
Understanding KeePass Database Compatibility
Before diving into individual apps, it helps to understand what “compatible” actually means. The KDBX format has evolved through several versions:
- KDB (1.x) – The original format, now considered legacy. Uses AES encryption with a simpler structure.
- KDBX 3.1 – Introduced with KeePass 2.x. Supports AES-256 encryption and the AES-KDF key derivation function.
- KDBX 4.x – The current standard. Adds support for Argon2 key derivation, ChaCha20 encryption, and a more robust header authentication scheme.
Most modern apps support KDBX 4.x, but some older or simpler tools only handle KDBX 3.1 or even the original KDB format. The listings below note format support where relevant.
Desktop Applications
KeePass (Windows)
KeePass is the original application that created the format. Developed by Dominik Reichl and first released in 2003, it remains actively maintained and is the reference implementation for the KDBX specification.
Platform: Windows (runs on Linux and macOS via Mono) Format support: KDB, KDBX 3.x, KDBX 4.x License: GPL v2 (open source)
KeePass offers the deepest feature set of any compatible application. Its plugin architecture supports hundreds of extensions: browser integration, cloud sync adapters, import/export converters for other password managers, custom field types, and automation scripts. The auto-type feature works system-wide on Windows, typing credentials into any application – not just browsers.
The trade-off is the interface. KeePass looks and feels like a classic Windows utility application. Users coming from polished commercial managers may find the learning curve steeper. But for power users who value configurability above aesthetics, KeePass remains unmatched.
KeePassXC (Cross-Platform)
KeePassXC is a community-driven, cross-platform rewrite of KeePass that has become the most popular desktop client for Linux and macOS users, and an increasingly common choice on Windows as well.
Platforms: Windows, macOS, Linux Format support: KDBX 3.x, KDBX 4.x (no legacy KDB) License: GPL v3 (open source)
KeePassXC is built natively in C++ using the Qt framework, which means it does not depend on Mono or .NET. This gives it a genuinely native feel on all three platforms. The interface is clean and modern while retaining the power that KeePass users expect.
Key features include built-in browser integration (via a companion extension for Firefox, Chrome, Edge, and Brave), SSH agent support for developers, TOTP (time-based one-time password) management, a password generator with passphrase support, and YubiKey/OnlyKey hardware token integration for additional database protection.
KeePassXC is the recommended desktop client for most users who value both open-source security and a polished experience.
MacPass (macOS)
MacPass is a native macOS application designed to feel at home on Apple hardware.
Platform: macOS only Format support: KDB, KDBX 3.x, KDBX 4.x License: GPL v3 (open source)
MacPass provides a clean, macOS-native interface with sidebar navigation, Quick Look integration, and Spotlight support. It supports auto-type, custom icons, file attachments, and the standard KeePass plugin for browser integration. Development has slowed in recent years compared to KeePassXC, but it remains a solid option for users who prefer a dedicated macOS-native experience.
KeeWeb (Cross-Platform and Web)
KeeWeb takes a different approach: it is an Electron-based desktop application that also runs entirely in a web browser.
Platforms: Windows, macOS, Linux, or any modern browser Format support: KDBX 3.x, KDBX 4.x License: MIT (open source)
KeeWeb can open KDBX files from local storage, Dropbox, Google Drive, OneDrive, or WebDAV servers. The browser version works without installation – you visit the KeeWeb website, open your vault file, and manage passwords entirely in your browser tab. No data is sent to any server; all decryption happens locally.
The interface is arguably the most visually polished in the KeePass ecosystem, with themes, tags, color coding, and a responsive layout. It is an excellent choice for users who want cloud sync without depending on a specific cloud provider, and for those who value the ability to access their vault from any device with a browser.
Mobile Applications
KeePassDX (Android)
KeePassDX is the leading KeePass client for Android, built specifically for the platform with Material Design guidelines.
Platform: Android Format support: KDB, KDBX 3.x, KDBX 4.x License: GPL v3 (open source)
KeePassDX supports Android’s autofill framework, meaning it can fill credentials directly into apps and browsers. It also supports fingerprint unlock (using a cipher key derived from the biometric), TOTP generation, a built-in keyboard for filling credentials in apps that do not support the autofill API, and file attachments.
The app works with databases stored locally or through any file provider registered with Android (Google Drive, Dropbox, Syncthing, Nextcloud, or any other storage app). This gives you full control over how and where your vault is synced without requiring the password manager itself to handle cloud storage.
Strongbox (iOS and macOS)
Strongbox has become the most feature-rich KeePass client on Apple platforms.
Platforms: iOS, iPadOS, macOS Format support: KDB, KDBX 3.x, KDBX 4.x (also supports Password Safe v3 format) License: Proprietary with open-source core (AGPL for the core library)
Strongbox integrates deeply with Apple’s ecosystem: Face ID and Touch ID unlock, iCloud Keychain integration, Apple Watch support, AutoFill on iOS and macOS, Siri Shortcuts, and Spotlight indexing. It supports TOTP, file attachments, custom fields, and YubiKey hardware tokens.
The app uses a freemium model. The free version is fully functional for basic use; the paid version adds features like biometric unlock, AutoFill, and automatic backups. For iPhone and iPad users who want a premium, native KeePass experience, Strongbox is the top recommendation.
KeePassium (iOS)
KeePassium is another excellent KeePass client for Apple devices, focused on simplicity and security.
Platforms: iOS, iPadOS Format support: KDB, KDBX 3.x, KDBX 4.x License: GPL v3 (open source) with a proprietary premium tier
KeePassium integrates with iOS AutoFill, supports Face ID and Touch ID, and works with any cloud storage provider via the iOS Files framework. It stands out for its security-first design: the app clears the database from memory when it enters the background, uses secure enclaves for key storage, and provides clear, understandable security indicators.
Like Strongbox, it offers a free tier with core functionality and a premium tier with additional features. Both are strong choices; KeePassium tends to appeal to users who value a more focused, less feature-dense interface.
Keepass2Android (Android)
Keepass2Android is a long-established Android client with a loyal user base.
Platform: Android Format support: KDB, KDBX 3.x, KDBX 4.x License: GPL v3 (open source)
The app includes built-in support for cloud storage (Dropbox, Google Drive, OneDrive, SFTP, WebDAV, and more), autofill integration, a QuickUnlock feature that re-opens the database using only the last few characters of your master password, and fingerprint unlock. It also offers an offline-only variant (Keepass2Android Offline) for users who want no network permissions whatsoever.
Keepass2Android was for many years the default Android recommendation. KeePassDX has gained ground due to its more modern interface, but both remain fully capable.
Browser Extensions
Browser extensions bridge the gap between your password database and the login forms you encounter daily. The most common approach uses a companion extension that communicates with a desktop application:
KeePassXC-Browser – The official browser extension for KeePassXC. Works with Firefox, Chrome, Edge, and Brave. Communication happens over a local, encrypted channel. No data leaves your machine. This is the most widely recommended browser integration in the ecosystem.
KeePassHttp and KeePassRPC – Older plugin-based approaches for the original KeePass application. KeePassHttp has been deprecated in favor of KeePassXC-Browser where possible, but it remains available for users who specifically need the original KeePass.
Kee – A browser extension (formerly KeeFox) that communicates with KeePass via the KeePassRPC plugin. It supports Firefox and Chrome and provides form detection, automatic filling, and password generation directly in the browser.
KeeWeb browser mode – As noted above, KeeWeb itself runs in a browser. While it is not a traditional extension, it provides browser-based access to your vault without requiring any desktop application at all.
Cloud Sync Options
One of the most common questions about KeePass-based solutions is how to keep a vault synchronized across devices. Because your database is a single encrypted file, any file synchronization tool works. This is a feature of the data portability that the open standard provides:
Dropbox, Google Drive, OneDrive, iCloud Drive – Store your KDBX file in a synced folder. Every app listed above can open files from these providers, either directly or through your operating system’s file system integration.
Syncthing – A peer-to-peer, open-source synchronization tool. Your data never touches a third-party server. Syncthing works on Windows, macOS, Linux, and Android. For users who want zero cloud involvement, this is the gold standard sync approach.
Nextcloud – A self-hosted cloud platform. If you run your own server, Nextcloud provides file sync with WebDAV access. Most KeePass apps support WebDAV natively.
WebDAV servers – Many NAS devices (Synology, QNAP) and web hosting providers support WebDAV, which KeePass clients can access directly.
SSH/SFTP – Some clients (Keepass2Android, KeePass with plugins) can open databases directly from an SSH server, which is useful for tech-savvy users who already maintain their own infrastructure.
The critical point is that you control the sync mechanism. Unlike proprietary password managers that force you onto their cloud service, KeePass databases work with whatever storage you trust.
Cross-Platform Comparison Table
| Feature | KeePassXC | KeePass | KeePassDX | Strongbox | KeePassium | KeeWeb |
|---|---|---|---|---|---|---|
| Windows | Yes | Yes | – | – | – | Yes |
| macOS | Yes | Via Mono | – | Yes | – | Yes |
| Linux | Yes | Via Mono | – | – | – | Yes |
| Android | – | – | Yes | – | – | – |
| iOS | – | – | – | Yes | Yes | – |
| Browser | Via extension | Via plugin | – | – | – | Yes |
| KDBX 4.x | Yes | Yes | Yes | Yes | Yes | Yes |
| Argon2 | Yes | Yes | Yes | Yes | Yes | Yes |
| TOTP | Yes | Via plugin | Yes | Yes | Yes | Yes |
| YubiKey | Yes | Via plugin | – | Yes | – | – |
| Autofill | Browser ext | Browser plugin | Android API | iOS API | iOS API | – |
| Biometric | – | – | Fingerprint | Face/Touch ID | Face/Touch ID | – |
| Open source | Yes | Yes | Yes | Partial | Yes | Yes |
| Price | Free | Free | Free | Freemium | Freemium | Free |
Which App Should You Use?
For Windows Users
KeePassXC is the default recommendation. It provides a modern, native experience with built-in browser integration and no plugin dependencies. If you need extensive customization, a specific plugin, or legacy KDB support that KeePassXC does not offer, the original KeePass remains the most configurable option.
For macOS Users
KeePassXC for most users. Strongbox if you want deep macOS integration with iCloud sync and a fully native Apple experience. MacPass if you prefer a simpler, lightweight native client.
For Linux Users
KeePassXC is the clear leader on Linux, with packages available for every major distribution and Flatpak/Snap/AppImage options for distribution-agnostic installation.
For Android Users
KeePassDX for its modern Material Design interface, strong autofill integration, and active development. Keepass2Android if you need built-in cloud storage support or the QuickUnlock feature.
For iPhone and iPad Users
Strongbox for the richest feature set and deepest Apple ecosystem integration. KeePassium for a more security-focused, streamlined experience.
For Multi-Platform Users
Use KeePassXC on desktop and KeePassDX (Android) or Strongbox/KeePassium (iOS) on mobile. Sync via Dropbox, iCloud Drive, or Syncthing. Alternatively, KeeWeb provides browser-based access from any device without installing platform-specific software.
The Power of an Open Ecosystem
The sheer number of compatible applications is not an accident – it is a direct consequence of the KeePass format being an open standard. Proprietary managers offer one app, one interface, one way of working. The KeePass ecosystem offers dozens, each optimized for different platforms, preferences, and threat models.
This is what open-source security looks like in practice. Your data is not held hostage by any single company’s business decisions. If an app is discontinued, you open your vault in another app. If a developer makes a decision you disagree with, you switch. Your passwords remain yours, stored in a format that anyone can implement and everyone can verify.
For users evaluating whether to use a password manager at all, the KeePass ecosystem demonstrates that you do not have to trade control for convenience. The apps listed here collectively cover every major platform, every common workflow, and every level of technical expertise – all while keeping your data in an encrypted, portable, open format that you fully own.
The gold standard for password management is not about a single application. It is about a format and an ecosystem that put the user in control. Whatever device you use, whatever operating system you prefer, there is a KeePass-compatible app that meets your needs.
