Choose KeePassXC if you want a native password-manager application on Windows, macOS and Linux with a straightforward browser-extension workflow. Choose KeePass 2.x if you are primarily on Windows and depend on its plugin ecosystem, synchronization, shared-database editing or scripting. Both can work with the modern KeePass KDBX database format, but they are not interchangeable in every feature. “KeePass” also describes two different editions: KeePass 1.x, which is maintenance-only and uses the older KDB format, and the active KeePass 2.x edition, which uses KDBX.
The practical question is therefore not whether KeePassXC is universally better. It is whether your operating systems, browser setup, database format and power-user features fit one application better than the other.
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First, separate KeePass 1.x from KeePass 2.x
The name KeePass is commonly used for two editions with different file formats and feature sets. KeePass 1.x is the older, maintenance-only edition. KeePass 2.x is the active edition and the one normally meant when people discuss current KeePass compatibility, plugins and synchronization.
Do these 3 things before closing this tab:
1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errors| Edition or application | Current role | Primary database format | Typical platform model |
|---|---|---|---|
| KeePass 1.x | Maintenance-only legacy edition | KDB | Older KeePass desktop workflow |
| KeePass 2.x | Active KeePass edition | KDBX | Windows application; can run on Linux, macOS, BSD and other systems through Mono |
| KeePassXC | Separate KeePass-compatible application | KDBX 3.1 and KDBX 4 | Native applications for Windows, macOS and Linux |
That distinction changes the answer to “Can I use the same KeePass database in KeePassXC?” If the database is a KDBX file from KeePass 2.x, usually yes. If it is a KDB file from KeePass 1.x, KeePassXC can import it into KDBX, but it cannot save a database back to KDB.
#1 Best Overall
- POWERFUL SECURITY KEY: The Security Key C NFC is the essential physical passkey for protecting your digital life from phishing attacks. It ensures only you can access your accounts.
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Quick comparison: where the applications differ
| Area | KeePass 2.x | KeePassXC | What the difference means |
|---|---|---|---|
| Desktop platforms | Windows; Linux, macOS, BSD and other systems through Mono | Native Windows, macOS and Linux applications | XC is generally simpler when you move among the three major desktop operating systems. KeePass 2.x can be used beyond Windows, but its runtime model is different. |
| Database files | KDBX for the current 2.x edition; KDB belongs to 1.x | Reads and writes KDBX 3.1 and KDBX 4; opens KDBX 2 and can upgrade it | KDBX is the practical interchange format between KeePass 2.x and KeePassXC. |
| KeePass 1.x migration | Uses KDB | Imports KDB into KDBX but cannot export KDB | Keep the original KDB until the converted KDBX database has been checked and backed up. |
| Browser autofill | Browser integration is provided through plugins | KeePassXC-Browser extension plus desktop browser-integration settings | XC has a defined extension-to-desktop connection; KeePass 2.x offers a broader plugin-oriented model. |
| Synchronization and shared work | Lists synchronization, shared database editing and URL-based database access | No built-in cloud-sync service; stores the database in a folder synchronized by a service you choose | These are different workflows, not equivalent implementations of one feature. |
| Customization | Plugins and scripting are listed capabilities | Has its own integration and extension model, but KeePass 2.x plugins do not automatically carry over | A compatible file does not make application-specific extensions portable. |
Platform and runtime compatibility
KeePassXC: native applications on three major desktop systems
KeePassXC is available as a native desktop application for Windows, macOS and Linux. “Native” here matters operationally: you install the application built for that operating system rather than relying on a compatibility runtime such as Mono. For a household with a Windows laptop, a Mac and a Linux workstation, the same application family and settings concepts are available on each desktop.
KeePass 2.x: Windows first, other systems through Mono
KeePass 2.x is designed around Windows, while the official comparison lists operation on Linux, macOS, BSD and other systems through Mono. That can be a good fit if your main computer is Windows and you already depend on KeePass 2.x, but it introduces a runtime layer on other systems. Installation, desktop integration and behavior can therefore differ from the Windows experience.
Neither comparison should be reduced to “one supports Linux and the other does not.” Both can be used on Linux; the distinction is native cross-platform packaging versus a Windows application running with Mono.
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KDBX is the shared KeePass 2.x/KeePassXC path
KeePassXC natively supports KeePass 2.x KDBX 3.1 and KDBX 4 files. It can also open KDBX 2 and upgrade that database to a supported newer format. A KDBX file can therefore be opened, edited and saved by both KeePass 2.x and KeePassXC in the normal cross-application workflow.
File compatibility covers the database structure: entries, groups, fields, attachments and the database’s encrypted container. It does not promise that a KeePass 2.x plugin, script or special integration will have an equivalent in KeePassXC.
Rank #2
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- WORKS WITH 1000+ ACCOUNTS: Compatible with popular accounts like Google, Microsoft, and Apple. A single YubiKey 5C NFC secures 100+ of your favorite accounts, including email, password managers, and more
- FAST & CONVENIENT LOGIN: Plug in your YubiKey 5C NFC via USB and tap it, or tap it against your phone (NFC), to authenticate. No batteries, no internet connection, and no extra fees required
- MOST SECURE PASSKEY: Supports FIDO2/WebAuthn, FIDO U2F, Yubico OTP, OATH-TOTP/HOTP, Smart card (PIV), and OpenPGP. That means it’s versatile, working almost anywhere you need it
- PRIMARY & SPARE KEYS: Just like having a spare house key, we recommend buying two YubiKeys - one for daily use and one as a spare. That way you’ll never get locked out of your accounts
KDB is a one-way import into KeePassXC
KeePass 1.x uses KDB, not KDBX. KeePassXC can import a KDB database and create a KDBX database from it. It cannot save that converted database back to KDB. Treat the conversion as a one-way format change, not as a reversible editing session.
Safe migration procedure
- Identify the file extension. A
.kdbfile indicates the KeePass 1.x format;.kdbxindicates the modern format used by KeePass 2.x and KeePassXC. - Make two protected copies. Copy the original database to a secure backup location before opening or converting it. Do not overwrite the only copy.
- Open or import in KeePassXC. Open a KDBX file directly. For KDB, use KeePassXC’s import function and select the KeePass 1.x/KDB source format.
- Save the resulting database as KDBX. Choose a clear filename so you can distinguish the converted file from the original.
- Check representative records. Verify ordinary logins, custom fields, notes, attachments, groups, URLs and any entries that use unusual data types.
- Test the new file on every computer. Open it with the application you intend to use on Windows, macOS and Linux before retiring the old workflow.
- Review integrations separately. Browser connections, plugins, scripts and hardware-backed unlock methods must be configured and tested in the destination application.
Keep the original KDB or KDBX backup until you have confirmed that the converted database opens correctly and that your required entries and attachments are present.
Browser autofill and extension setup
KeePassXC’s browser workflow
KeePassXC uses the KeePassXC-Browser extension together with a setting in the desktop application. The extension is not a standalone password database. It connects to the running KeePassXC application, and the database must be unlocked before credentials can be requested.
- Install the KeePassXC-Browser extension for your browser.
- Open KeePassXC and unlock the database you want to use.
- Open KeePassXC’s settings and go to the Browser Integration section.
- Enable integration for the browser you installed the extension in.
- In the extension, start the connection process and approve the pairing request shown by KeePassXC.
- Confirm that the extension can see the unlocked database, then test a login on a site represented by an entry.
The desktop application, extension and unlocked database are all required. If any one is missing, the extension may appear installed while autofill remains unavailable.
KeePass 2.x’s plugin model
KeePass 2.x lists browser integration through plugins rather than one built-in KeePassXC-Browser workflow. This gives Windows-focused users access to a plugin ecosystem and lets them choose an integration that fits their browser and policy requirements. It also means that setup, maintenance and compatibility depend on the particular plugin.
Rank #3
- POWERFUL SECURITY KEY: The YubiKey 5 NFC is the most versatile physical passkey, protecting your digital life from phishing attacks. It ensures only you can access your accounts
- WORKS WITH 1000+ ACCOUNTS: Compatible with popular accounts like Google, Microsoft, and Apple. A single YubiKey 5 NFC secures 100+ of your favorite accounts, including email, password managers, and more
- FAST & CONVENIENT LOGIN: Plug in your YubiKey 5 NFC via USB and tap it, or tap it against your phone (NFC), to authenticate. No batteries, no internet connection, and no extra fees required
- MOST SECURE PASSKEY: Supports FIDO2/WebAuthn, FIDO U2F, Yubico OTP, OATH-TOTP/HOTP, Smart card (PIV), and OpenPGP. That means it’s versatile, working almost anywhere you need it
- PRIMARY & SPARE KEYS: Just like having a spare house key, we recommend buying two YubiKeys - one for daily use and one as a spare. That way you’ll never get locked out of your accounts
When moving from KeePass 2.x to KeePassXC, do not assume that an installed browser plugin moves with the KDBX file. Install and pair KeePassXC-Browser separately, then verify matching, filling and saving behavior before relying on it for daily logins.
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Browser and Linux packaging caveat
KeePassXC’s current guide notes that browsers installed as Flatpak or Snap packages are generally unsupported for browser integration, with Ubuntu’s Firefox Snap listed as an exception. Packaging can change, so check the current KeePassXC browser-integration guide for your exact browser package before troubleshooting the database.
Synchronization, shared databases and remote access
What KeePass 2.x lists
The KeePass 2.x feature comparison lists database synchronization, shared database editing and URL-based database access. Those features matter when several computers or people need to work from a common database and you want the application itself to participate in that workflow. KeePass 2.x also lists plugins and scripting, which can extend or automate parts of the process.
“Synchronization” does not mean that every possible cloud provider is built into the application. It describes KeePass 2.x capabilities for keeping database copies aligned, including workflows in which the database is accessed remotely. Configure and test the exact storage and conflict behavior you intend to use.
How KeePassXC handles cloud folders
KeePassXC does not provide a native cloud-sync service. Its documentation describes placing the database file in a shared folder and allowing a synchronization service selected by you to copy that file between devices. The synchronization service is therefore an external part of the workflow, while KeePassXC remains the application that opens and encrypts the database.
Rank #4
- POWERFUL SECURITY KEY: The Security Key NFC is the essential physical passkey for protecting your digital life from phishing attacks. It ensures only you can access your accounts.
- WORKS WITH 1000+ ACCOUNTS: Compatible with Google, Microsoft, and Apple. A single Security Key NFC secures 100 of your favorite accounts, including email, password managers, and more.
- FAST & CONVENIENT LOGIN: Plug in your Security Key NFC via USB-A and tap it, or tap it against your phone (NFC) to authenticate. No batteries, no internet connection, and no extra fees required.
- TRUSTED PASSKEY TECHNOLOGY: Uses the latest passkey standards (FIDO2/WebAuthn & FIDO U2F) but does not support One-Time Passwords. For complex needs, check out the YubiKey 5 Series.
- BUILT TO LAST: Made from tough, waterproof, and crush-resistant materials. Manufactured in Sweden and programmed in the USA with the highest security standards.
- Create or choose a private folder that your selected synchronization service can synchronize across your devices.
- Place the KDBX database in that folder.
- Install KeePassXC on each desktop and open the synchronized KDBX path.
- Allow synchronization to complete before opening the database on another device.
- After an edit, save and wait for the file to finish synchronizing before making another edit elsewhere.
Do not describe this as built-in KeePassXC cloud synchronization: the service and its account are separate from KeePassXC. Make sure every device is using the intended KDBX path, and retain an independent backup rather than relying on one synchronized copy.
Shared editing is a workflow decision
If several users need to edit one database, KeePass 2.x’s listed shared-editing and synchronization features may be a reason to stay with KeePass 2.x, especially in a Windows-centered environment. KeePassXC’s shared-folder approach can still distribute a KDBX file, but the synchronization service and the way users coordinate edits become central to the design. A file that is merely accessible from several devices is not automatically a well-managed collaborative system.
Plugins, scripting and specialized integrations
KeePass 2.x lists plugins and scripting as first-class capabilities. This is significant for users who have built a workflow around a particular plugin, custom automation or URL-based access method. Before switching, inventory what you actually use: a browser connector, import/export tool, command-line helper, script, smart-card integration or another extension.
KeePassXC has its own feature and extension model. A KDBX database opened in KeePassXC does not bring KeePass 2.x plugins into the new application, and a plugin’s settings are not stored as ordinary database entries. Re-create each required integration in KeePassXC and test it before uninstalling KeePass 2.x.
Hardware unlock and USB portability
YubiKey compatibility caveat
KeePassXC documentation says YubiKeys cannot currently be used when compatibility between KeePass 2 and KeePassXC is required. Do not add a YubiKey to a shared KeePass 2.x/KeePassXC workflow without checking the exact database protection and application configuration. A hardware method that works in one application may prevent the other from opening the file.
Best Value
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USB drives are optional, not a security strategy
A KeePass database is one file, so it can be transferred or carried on a USB flash drive. KeePass’s documentation lists running from a USB stick as a portability capability, and a removable drive can hold an additional database copy. Neither KeePass 2.x nor KeePassXC requires a USB drive, however, and the drive alone is not a safe backup plan. Protect additional copies, keep them under your control and verify that they can actually be opened.
Which should you choose?
Choose KeePassXC when
- You want native applications on Windows, macOS and Linux.
- You prefer one documented KeePassXC-Browser extension workflow for browser integration.
- Your database is already KDBX, or you are willing to convert a legacy KDB file once.
- You are comfortable choosing a separate synchronization service and placing the KDBX file in its synchronized folder.
- You do not depend on a KeePass 2.x-only plugin or script.
Choose KeePass 2.x when
- Your primary environment is Windows and your existing setup is stable there.
- You rely on a specific KeePass 2.x plugin, script or browser-integration extension.
- You need the synchronization, shared database editing or URL-based database access capabilities listed for KeePass 2.x.
- Your team has already standardized on KeePass 2.x procedures and integrations.
Do not choose based on the file extension alone
A KDBX file makes migration technically practical, but it does not settle the operating-system, browser, synchronization or plugin questions. Decide which application will be authoritative, then test the complete workflow: unlock the database, edit an entry, use browser autofill, save, synchronize if applicable and restore from a backup.
Switching checklist
- Confirm whether the source is KeePass 1.x/KDB or KeePass 2.x/KDBX.
- Back up the original database before conversion or editing.
- Confirm that the destination supports the KDBX version you use.
- Verify entries, custom fields, notes, attachments, groups and URLs after opening or importing.
- Pair the browser extension with the desktop app and test autofill while the database is unlocked.
- Reinstall or replace every plugin and script you depend on.
- Decide whether synchronization belongs to KeePass 2.x’s workflow or to an external synchronized folder used by KeePassXC.
- Check hardware-backed unlock compatibility before enabling it on a shared database.
- Keep an independent backup and test opening it.
Common problems and fixes
KeePassXC says it cannot open the file
Check whether the file is KDB rather than KDBX. Import the KDB file instead of trying to open it as a modern database, then save the converted result as KDBX. If the file is KDBX, verify that it is not an incomplete synchronized copy and try the known-good backup.
The browser extension is installed but does nothing
Unlock the database, enable the relevant browser in KeePassXC’s Browser Integration settings and complete the extension pairing. If you use a Flatpak or Snap browser, check whether that package is supported; Ubuntu’s Firefox Snap is the documented exception to the general limitation.
A KeePass 2.x feature disappeared after migration
Separate database data from application features. Entries and groups may be present in KDBX while a KeePass 2.x plugin, script or hardware integration is absent. Identify the missing integration, find its KeePassXC equivalent if one exists and test it independently.
Two computers show different versions of the database
Confirm that both applications open the same synchronized path, wait for synchronization to finish and avoid editing separate local copies. Keep a separate backup so that resolving a synchronization mistake does not destroy the last known-good database.
Quick Recap
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