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Short answer: KeePassXC is usually the simpler choice when you want a native password-manager application on Windows, macOS, and Linux, plus a dedicated browser extension. KeePass 2.x is worth choosing when you are Windows-focused and depend on its plugin ecosystem, synchronization, shared-database editing, URL-based database access, or scripting.
“KeePass” is not one interchangeable program. KeePass 1.x and KeePass 2.x are separate editions; 2.x is the active edition, while 1.x is maintenance-only. KeePassXC is designed around the KeePass 2.x KDBX database format, so the edition and file format matter before you switch.
What “KeePass” means in this comparison
The name KeePass commonly refers to two different desktop editions. KeePass 1.x uses the older KDB database format and is maintained for existing users. KeePass 2.x is the current, actively developed edition and uses KDBX. KeePassXC is a separate application that works natively with KeePass 2.x KDBX files.
| Edition or application | Current role | Primary database format | Platform model |
|---|---|---|---|
| KeePass 1.x | Maintenance-only edition | KDB | Windows-oriented |
| KeePass 2.x | Active KeePass edition | KDBX | Windows application; can run on other systems through Mono |
| KeePassXC | Independent cross-platform application | KDBX 3.1 and KDBX 4; can open KDBX 2 | Native applications for Windows, macOS, and Linux |
Therefore, “Can I use my KeePass database in KeePassXC?” has different answers. A KeePass 2.x KDBX file is the normal compatibility case. A KeePass 1.x KDB file can be imported into KeePassXC and converted to KDBX, but KeePassXC cannot save the result back as 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.
- WORKS WITH 1000+ ACCOUNTS: Compatible with Google, Microsoft, and Apple. A single Security Key C NFC secures 100 of your favorite accounts, including email, password managers, and more.
- FAST & CONVENIENT LOGIN: Plug in your Security Key C NFC via USB-C 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.
KeePassXC vs. KeePass 2.x at a glance
| Area | KeePassXC | KeePass 2.x |
|---|---|---|
| Operating systems | Native applications on Linux, macOS, and Windows | Windows application; runs on Linux, macOS, BSD, and other systems through Mono |
| Database formats | Reads and writes KDBX 3.1 and KDBX 4; opens KDBX 2 and can upgrade it; imports KDB but cannot write KDB | Uses KeePass 2.x KDBX databases |
| Browser integration | KeePassXC-Browser extension connected to the unlocked desktop application | Browser integration supplied through plugins |
| Synchronization | No built-in cloud synchronization; place the database in a folder handled by a sync service you choose | Lists synchronization as a feature, along with shared database editing |
| Shared and remote workflows | Uses the file and external synchronization choices you arrange | Lists shared database editing and URL-based database access |
| Extensibility | More focused desktop and browser-integration feature set | Plugin ecosystem and scripting support |
| Hardware-key caveat | Documentation says YubiKeys cannot currently be used when compatibility between KeePass 2 and KeePassXC is required | Hardware-key behavior depends on the KeePass 2.x configuration and the compatibility requirement |
The table describes different workflows, not a universal winner. A database file may open in both applications while a plugin, script, synchronization method, or hardware-key setup remains application-specific.
Platform and runtime differences
KeePassXC is native on the three major desktop platforms
KeePassXC provides native builds for Linux, macOS, and Windows. “Native” here matters because the application is designed for each operating system rather than depending on a separate compatibility runtime. If you regularly move between those three platforms, you can keep the same KDBX database while using an application that follows the platform’s normal desktop conventions.
Linux users still need to pay attention to how both the application and browser were packaged. The KeePassXC user guide notes that Flatpak and Snap-based Linux browsers are generally unsupported for browser integration, with Ubuntu’s Firefox Snap identified as an exception. Check the current guide for your exact browser and package type before assuming that the extension will connect.
KeePass 2.x is Windows-first, with Mono for other systems
KeePass 2.x is primarily a Windows application. It can run on Linux, macOS, BSD, and other systems through Mono, a separate runtime environment. That can be a practical solution when you already depend on KeePass 2.x features, but it introduces another layer to install and maintain.
For a Windows-only computer, the runtime distinction may not affect your daily work. For a mixed-device household or a user who wants the same application experience on Linux and macOS, KeePassXC’s native availability is the more straightforward starting point.
Rank #2
- POWERFUL SECURITY KEY: The YubiKey 5C 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 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
Choose by device mix, not by the word “cross-platform” alone
- Choose KeePassXC first if you want native applications on Windows, macOS, and Linux and do not need a KeePass 2.x-specific plugin or scripting workflow.
- Consider KeePass 2.x first if Windows is your main platform and your work depends on its plugins, synchronization, shared editing, URL-based database access, or scripting.
- Test before changing if you use Mono on a non-Windows system, because the database may be compatible even when the surrounding runtime and integrations are not identical.
Database formats and what transfers
KDBX is the normal KeePassXC/KeePass 2.x interchange format
KeePassXC supports KeePass 2.x KDBX formats 3.1 and 4. It can also open a KDBX 2 database and upgrade it. That makes a KeePass 2.x database the natural starting point for a move to KeePassXC: open the file, verify the entries, and save it in the format you intend to use going forward.
Opening the same KDBX file in two applications does not make every surrounding feature portable. Entries, groups, fields, attachments, and the database structure are file data; a browser plugin, script, synchronization provider, or hardware-key integration belongs to the application and its configuration.
KeePass 1.x KDB files require a one-way conversion
KeePassXC can import a KeePass 1.x KDB file into KDBX. It cannot save a KDBX database back to KDB. Treat this as a one-way migration for planning purposes. Keep the original KDB file unchanged until you have opened the converted database, checked important entries, and confirmed that the new workflow works.
The same distinction applies if you are moving from KeePass 1.x to KeePass 2.x: the destination is a KDBX database, not a KDB database that both applications continue to update interchangeably.
Safe migration sequence
- Identify the edition. Confirm whether the source application is KeePass 1.x or KeePass 2.x. Look at the file extension as a clue: KDB generally indicates KeePass 1.x, while KDBX indicates KeePass 2.x.
- Make an untouched copy. Copy the original database to a separate location before importing or upgrading it. Do not use the only copy as your conversion target.
- Open or import in the destination. Open a KDBX file directly in KeePassXC. For a KDB file, use KeePassXC’s import process to create a KDBX database.
- Save deliberately. Choose the KDBX version and location you intend to use. KeePassXC cannot restore a KDBX database to KDB format.
- Audit representative records. Check logins, custom fields, attachments, groups, notes, and any entries used by browser integration. A file opening successfully proves basic format compatibility, not that every application-specific feature transferred.
- Reconnect integrations. Configure the browser extension, plugins, scripts, synchronization folder, or hardware-key method in the new application rather than assuming the old application’s settings came with the file.
Browser autofill and integration
How KeePass 2.x handles browsers
KeePass 2.x lists browser integration through plugins. This approach gives users access to a broader plugin ecosystem, but the exact browser, plugin, and configuration determine the result. A plugin-based setup can be valuable if your existing workflow depends on a particular extension or automation method.
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
How KeePassXC handles browsers
KeePassXC uses the KeePassXC-Browser extension together with browser-integration settings in the desktop application. The extension is not a standalone password store. It must be connected to the KeePassXC desktop app, and the database must be unlocked when you want the browser to retrieve credentials.
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- Install KeePassXC and open the KDBX database you want to use.
- In KeePassXC, open the application settings and enable browser integration.
- Install the KeePassXC-Browser extension for your browser.
- Use the extension’s connection prompt to pair it with the running KeePassXC desktop application.
- Approve the connection request in KeePassXC and confirm that the extension identifies the intended database.
- Unlock the database before requesting a login from the browser. A locked database cannot provide credentials to the extension.
If pairing fails, first check that the desktop application is running, browser integration is enabled, and the database is unlocked. On Linux, also check whether the browser was installed as a Flatpak or Snap package; the current KeePassXC guide says those browser packages are generally unsupported, apart from the documented Ubuntu Firefox Snap exception.
Do not confuse compatible entries with identical autofill behavior
A KDBX file can move between KeePass 2.x and KeePassXC while browser behavior changes. KeePass 2.x plugins and KeePassXC-Browser are separate integration layers. Recreate the connection after switching and verify several sites, especially entries with custom URLs, multiple usernames, or nonstandard login forms.
Synchronization, shared editing, and remote access
KeePass 2.x’s listed power-user features
The KeePass 2.x feature comparison lists synchronization, shared database editing, URL-based database access, plugins, and scripting. These capabilities appeal to users who need a more extensible or collaborative workflow, particularly on Windows or in an environment already organized around KeePass 2.x tooling.
“Synchronization” and “shared editing” are not the same as merely copying a file. They describe workflows in which changes can be reconciled or a database can be accessed through a location or service suited to multiple users or devices. The exact behavior depends on the KeePass 2.x feature and configuration you select.
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.
KeePassXC delegates cloud synchronization to your chosen service
KeePassXC does not include its own cloud-synchronization service. Its documentation describes placing the database file in a folder handled by a synchronization service you choose. The service synchronizes that file; KeePassXC opens and saves it.
This can work well if you already have a trusted synchronized folder and understand how that service handles file versions. It is different from saying that KeePassXC has native cloud sync. Keep the database location consistent across devices, and open the copy that your service is actually synchronizing.
When the workflow difference decides the choice
- One person, several desktops: KeePassXC plus a synchronized folder can be sufficient if you prefer to choose the storage service yourself.
- Existing KeePass 2.x synchronization or shared editing: Staying with KeePass 2.x avoids redesigning a workflow that already depends on those listed capabilities.
- Remote database access: KeePass 2.x’s listed URL-based database access may matter more than native cross-platform packaging.
- Automation: KeePass 2.x’s plugins and scripting are a stronger reason to remain with it than a general preference for one interface.
Plugins, scripts, and hardware keys
Plugins and scripts are not stored in the KDBX file
KDBX compatibility transfers the database, not the KeePass 2.x plugin installation or scripts. If a plugin supplies browser integration, synchronization, custom commands, or another workflow, install and configure the corresponding component separately in the destination application. KeePassXC’s compatibility with the file should not be read as compatibility with every KeePass 2.x extension.
YubiKey compatibility needs special checking
KeePassXC documentation states that YubiKeys cannot currently be used when compatibility between KeePass 2 and KeePassXC is required. Do not choose a YubiKey-based setup as a generic accessory for a shared KeePass 2.x/KeePassXC workflow without checking the exact configuration and compatibility requirements. A hardware-key arrangement that works in one application may prevent the same database from opening in the other.
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KeePass databases consist of a file, so portability can include copying that file to another computer or carrying it on a USB flash drive. KeePass’s comparison lists running from a USB stick as a portability capability, and KeePassXC describes the database as a file that can be transferred or stored in a shared folder.
Best Value
- Security Key : Protect your online accounts against unauthorized access by using FIDO2 and U2F authentication with T110. It's the world's most protective security key that works with windows, Mac OS, Linux as well as Chrome, Firefox, Edge and many other major browsers.
- Certified with the new FIDO2 standard, T110 provides the benefit of fast login and strong protection against phishing, account takeover as well as many other online attactks.
- Works with : Bank of America, Github, Google, Microsoft, DUO, Twitter, Facebook, Dropbox, Apple, ebay, BINANCE, mor and more.
- Fits USB-A port : Insert the T110 security key into the USB-A port of each service and log in conveniently with one touch
- For the driver download and user guide, please visit TrustKey Solutions Home support page.
A USB drive is optional: neither application requires one. It is also not a complete backup plan. A removable drive can be lost, damaged, or left with an outdated copy. If you use one for travel or transfer, keep an additional independent copy and know which database file is current before making changes.
How to switch from KeePass 2.x to KeePassXC
- Confirm the source file is KDBX. KeePassXC’s native compatibility target is KeePass 2.x KDBX, not the older KDB format.
- Back up the original file. Preserve the KeePass 2.x copy before opening it elsewhere.
- Install KeePassXC on each target system. Use the native build appropriate for Windows, macOS, or Linux.
- Open the KDBX database. If it is KDBX 2, allow KeePassXC to upgrade it and save the resulting KDBX file as your new working copy.
- Review the database. Check important groups, entries, attachments, notes, custom fields, and passwords.
- Set up browser integration again. Enable KeePassXC’s browser integration, install KeePassXC-Browser, pair the extension, and test it with the database unlocked.
- Rebuild external workflows. Replace KeePass 2.x plugins, scripts, synchronization settings, shared-editing arrangements, or URL-based access with an approach supported by KeePassXC and your chosen storage service.
- Keep the old application available temporarily. Do not delete KeePass 2.x until the replacement workflow has passed your real-world checks.
How to switch from KeePassXC to KeePass 2.x
- Use the KDBX file created by KeePassXC. KeePass 2.x is the relevant KeePass edition for KDBX interoperability.
- Open the database in KeePass 2.x and verify entries. Check the same representative records you used during the original migration.
- Configure KeePass 2.x integrations independently. Install the browser plugin, synchronization method, scripts, or other plugins required for your workflow.
- Check any database-protection method. If the database depends on a YubiKey or another hardware-key arrangement, confirm that the chosen setup does not conflict with future KeePassXC compatibility.
- Do not expect a return to KeePass 1.x KDB. KeePassXC’s conversion path from KDB to KDBX is not reversible from KeePassXC.
Which application fits your situation?
| Your priority | Better starting point | Reason |
|---|---|---|
| Native Windows, macOS, and Linux applications | KeePassXC | It is natively available on all three platforms. |
| Windows-first setup with established plugins | KeePass 2.x | Its plugin ecosystem is a central part of the listed feature set. |
| KeePass 2.x synchronization or shared database editing | KeePass 2.x | Those capabilities are listed directly for KeePass 2.x, while KeePassXC delegates synchronization to an external service. |
| Simple browser integration across supported desktop systems | KeePassXC | KeePassXC-Browser provides a defined extension-plus-desktop workflow. |
| Custom scripts and automation | KeePass 2.x | Scripting and plugins are explicitly listed capabilities. |
| Existing KeePass 1.x KDB database | Either, after conversion | Import or convert to KDBX first; KeePassXC cannot save a KDBX file back to KDB. |
| Shared KeePass 2.x/KeePassXC hardware-key setup | Check before choosing | KeePassXC documents a current YubiKey compatibility limitation for this scenario. |
Troubleshooting common compatibility problems
The database opens in one application but not the other
Check the file format and edition first. A KDBX file belongs to the KeePass 2.x format family; a KDB file is from KeePass 1.x. KeePassXC can import KDB into KDBX, but it cannot write KDB. If the file is KDBX 2, let KeePassXC upgrade it and then test the new copy rather than repeatedly opening the original.
The browser extension cannot connect
Make sure KeePassXC is running, browser integration is enabled, and the database is unlocked. Re-pair the extension if you changed applications or database files. On Linux, verify that the browser package is supported; Flatpak and Snap browser packaging is generally unsupported according to the current KeePassXC guide, with the documented Ubuntu Firefox Snap exception.
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That is expected when only the database was moved. Plugins and scripts are application-side components. Install a supported replacement or keep KeePass 2.x for that workflow if no equivalent exists in KeePassXC.
Changes made on another device are missing
KeePassXC itself does not provide cloud synchronization. Confirm that the database is inside the folder managed by your chosen synchronization service and that you opened the synchronized copy on both devices. If you rely on KeePass 2.x synchronization or shared editing, verify that the KeePass 2.x method is still configured rather than assuming a KDBX file alone supplies it.
A YubiKey-protected database must work in both applications
Pause the migration and check the exact compatibility requirement. KeePassXC’s documentation says YubiKeys cannot currently be used when compatibility between KeePass 2 and KeePassXC is required. Do not remove the original database or protection method until you have confirmed an interoperable configuration.
Bottom-line recommendation
For most people choosing a new cross-platform desktop password manager, start with KeePassXC: it offers native Windows, macOS, and Linux applications, works directly with KeePass 2.x KDBX databases, and has a defined KeePassXC-Browser integration path. Choose KeePass 2.x instead when its Windows-centered plugin ecosystem, synchronization, shared editing, URL-based access, or scripting is essential to your workflow. If your starting point is KeePass 1.x, plan a one-way KDB-to-KDBX conversion and keep the original file until every important entry and integration has been checked.
Quick Recap
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