Best Password Manager for Linux in 2026: Offline, Free, Open Source

Linux users tend to value control, transparency, and privacy. Yet most password managers push you toward cloud sync, browser extensions, and online accounts — an approach that conflicts with the Linux philosophy. If you're looking for a password manager for Linux that works entirely offline, this guide covers what to look for, how the main options compare, and why a local vault is often the better choice.

What Linux users should look for in a password manager

Not all password managers treat Linux as a first-class platform. When evaluating options, consider these criteria:

• Native Linux support — not a browser extension or a web app, but software that runs on your Linux desktop.
• Offline capability — the password manager should work without an internet connection.
• Local encryption — all encryption and decryption should happen on your machine, not on a remote server.
• No account required — avoid tools that require you to register with an email or create a cloud account.
• Transparent security — the encryption algorithm and key derivation method should be documented and verifiable.
• No recurring subscription — a free and open source model is more aligned with the ownership-oriented Linux community.

The problem with cloud-based managers on Linux

Many popular password managers offer Linux support, but with caveats:

• Browser-only experience — some managers only work as browser extensions on Linux, with no standalone app.
• Forced cloud sync — your vault is stored on the provider's servers, often with no option to keep it local.
• Electron wrappers — heavy desktop apps that consume significant resources for what should be a lightweight tool.
• Subscription fatigue — monthly or yearly fees for features many Linux users don't need (cloud sync, sharing, family plans).

Why offline password managers work better for Linux

Full local control

An offline password manager for Linux keeps the vault on your file system. You decide where it's stored, how it's backed up, and whether it's ever copied elsewhere. No third-party infrastructure is involved.

Minimal attack surface

Without cloud sync, there are no APIs, no authentication endpoints, and no remote servers to secure. The only attack vector is physical access to your device combined with knowing your master password.

Works in air-gapped environments

Developers, sysadmins, and security professionals often work on machines without internet access. An offline password manager works identically whether you're online or completely disconnected.

No dependency on external services

Cloud password managers can change their terms, increase prices, or shut down entirely. With a local password manager, the software runs independently. Your data is never held hostage by a provider.

SSH Connection Manager — a feature Linux users actually need

If you manage servers, VPS instances, or cloud infrastructure, SSH is part of your daily workflow. Most password managers let you store SSH keys as file attachments — but that's where they stop. OneCritto goes further with a dedicated SSH Connection Manager (introduced in v2.7.0) that lets you save, organize and launch SSH sessions directly from your vault.

Your private keys (id_rsa, id_ed25519, .pem) are stored encrypted inside the vault with AES-256-GCM. When you click Connect, OneCritto decrypts the key into a protected temporary file, sets restrictive permissions (required by OpenSSH), and opens your system terminal with the full SSH command — ready to use. The temporary key file is overwritten with random data and securely deleted when OneCritto closes.

No other offline password manager offers this level of SSH integration. It replaces scattered key files in ~/.ssh/, eliminates the need to remember hostnames and ports, and keeps everything encrypted in a single vault file.

OneCritto: an offline password manager built for Linux

OneCritto is designed to run natively on Linux and Windows. It's not a browser extension or a web app — it's a desktop application that stores your vault locally with AES-256 GCM encryption.

Key features for Linux users

• Native Linux desktop app — runs on major Linux distributions without Wine or compatibility layers.
• AES-256 GCM encryption — military-grade encryption with Argon2id key derivation (64 MB RAM, 3 iterations) for the master password.
• Stores passwords, files, and notes — keep API keys, SSH credentials, config files, and private notes in one encrypted vault.
• Single vault file — easy to back up, move between machines, or store on encrypted USB drives.
• Sentinel security engine — scores every password 0–100, detects duplicates, weak patterns, common passwords, and checks against known data breaches via k-anonymity (Have I Been Pwned).
• Built-in SSH Connection Manager — save, organize and launch SSH sessions directly from OneCritto. Private keys are stored encrypted in the vault and decrypted only at connection time into a secure temporary file with restrictive permissions. The terminal opens with the session ready to use. No other password manager offers this level of SSH integration.
• Auto-lock and secure clipboard — vault locks after 3 minutes of inactivity, clipboard is cleared after 20 seconds.
• No account, no sign-up — download, install, and start using. No personal information collected.
• Free and open source — completely free, with source code available on GitHub for review.

Supported Linux distributions

OneCritto is a Java-based desktop application that runs on any Linux distribution with a modern desktop environment. Here's the compatibility status for the most popular distributions:

• Ubuntu 22.04+ — fully supported. Extract the archive and run.
• Fedora 38+ — fully supported. Works with both GNOME and KDE Plasma.
• Debian 12+ — fully supported.
• Linux Mint 21+ — fully supported. Tested with Cinnamon desktop.
• Arch Linux / Manjaro — fully supported.
• openSUSE — compatible. Requires a 64-bit system with 8 GB RAM.

Requirements: 64-bit CPU, 8 GB RAM, 200 MB free storage, and a desktop environment (GNOME, KDE Plasma, Cinnamon, XFCE, etc.).

Getting started on Linux

1. Download — get the Linux installer from onecritto.com/download
2. Extract and run — no complex installation process. Extract the archive and launch the application.
3. Create your vault — choose a master password. The encrypted vault is created on your local disk.
4. Start storing credentials — add passwords, files, and notes. Everything is encrypted with AES-256 GCM.

Linux password managers compared: OneCritto vs KeePassXC vs Bitwarden vs 1Password

OneCritto vs KeePassXC

Both OneCritto and KeePassXC are open-source, offline password managers that store vaults locally. They share the same philosophy of local control and zero cloud dependency. The main differences:

• Vault format — KeePassXC uses the KDBX format with AES-256 or ChaCha20. OneCritto uses its own .onecritto format with AES-256-GCM and Argon2id key derivation.
• File attachments — both support encrypted file storage inside the vault. OneCritto uses streaming encryption (Bouncy Castle GCM) to handle large files without loading them entirely into RAM.
• Security analysis — OneCritto includes a built-in Sentinel engine that scores every password (0–100), detects keyboard patterns, leet-speak, common passwords, duplicates, and checks against the Have I Been Pwned database. KeePassXC has basic password health reports.
• SSH Connection Manager — OneCritto includes a built-in SSH session manager: store connections, launch terminals with one click, keys decrypted on the fly. KeePassXC can store SSH keys but has no integrated connection launcher.
• Browser integration — KeePassXC has native browser extensions for autofill. OneCritto focuses on the desktop experience and doesn't require browser extensions.
• Interface — OneCritto offers a modern dark-themed UI built with JavaFX. KeePassXC uses a Qt-based interface.

Both are excellent choices. KeePassXC is more established with a larger community. OneCritto is newer, with a focus on integrated security analysis and a streamlined single-vault approach.

OneCritto vs Bitwarden

Bitwarden is cloud-first. While the source code is open, the standard setup requires syncing your vault to Bitwarden's servers. Self-hosting (Vaultwarden) is possible but requires Docker, a database, and ongoing maintenance. OneCritto requires zero infrastructure — no server, no Docker containers, no database. It's a desktop application that stores everything in one local file. OneCritto also offers a built-in SSH Connection Manager — a feature Bitwarden doesn't provide, making OneCritto a more complete tool for developers and sysadmins who rely on SSH daily.

OneCritto vs 1Password

1Password is entirely cloud-based with subscription pricing ($36+/year). There is no option to keep your vault local-only, and the source code is not available. OneCritto is the opposite: free, open source, fully offline, no subscription, no account required.

Linux password vault management: best practices

Once you've chosen a password manager for Linux, follow these practices to keep your vault secure:

• Choose a strong master password — at least 14 characters, mixing uppercase, lowercase, digits, and symbols. The master password is the single point of access to your entire vault.
• Back up the vault file — copy the encrypted vault to an external drive or USB stick regularly. Since it's AES-256 encrypted, the backup is safe even on untrusted storage.
• Set file permissions — on Linux, restrict access to the vault file with chmod 600 ~/.onecritto/vault.onecritto. OneCritto does this automatically.
• Include the vault in existing backup scripts — if you use rsync, borgbackup, or similar tools, add the vault file to your backup targets.
• Test vault recovery — periodically copy the vault to a different machine and verify you can open it with your master password.
• Use the Sentinel dashboard — OneCritto's Sentinel scores your vault health (0–100) and suggests which passwords to rotate first.

FAQ — Password manager for Linux

What is the best password manager for Linux in 2026?

For offline, local-first password management, OneCritto and KeePassXC are the top open-source options. OneCritto adds integrated security scoring and breach checking. For cloud-based workflows with self-hosting, Bitwarden (Vaultwarden) is a strong option but requires server infrastructure.

Which Linux distributions does OneCritto support?

OneCritto runs on major Linux distributions including Ubuntu 22.04+, Fedora 38+, Debian 12+, Linux Mint 21+, Arch Linux, Manjaro, and openSUSE. It requires a 64-bit CPU, 8 GB RAM, and a desktop environment.

Can I use the same license on Linux and Windows?

Yes. OneCritto is free and open source on both Linux and Windows.

Is there a password manager for Linux that works offline?

Yes. OneCritto is designed to work entirely offline. The vault is a local encrypted file, and the software never makes any network connection. KeePassXC also works offline.

Is there a CLI version?

OneCritto is currently a desktop GUI application. It provides a clean, focused interface for managing your vault.

How do I back up my password vault on Linux?

The vault is a single encrypted file. Copy it to a USB drive, external disk, or include it in your rsync / borgbackup scripts. Since it's AES-256 encrypted, the backup is safe even on untrusted storage media.

Is there a free password manager for Linux with no subscription?

Yes. OneCritto is completely free and open source with no subscription, no recurring fees, and no premium tier. KeePassXC is also free. Bitwarden has a free tier but limits some features behind a subscription.

Does OneCritto work on Fedora?

Yes. OneCritto is fully supported on Fedora 38 and later, with both GNOME and KDE Plasma desktops.

Does OneCritto work on Linux Mint?

Yes. OneCritto is fully supported on Linux Mint 21+ and has been tested with the Cinnamon desktop environment.

Can I manage SSH keys and API tokens in a Linux password vault?

Yes. OneCritto supports passwords, private notes, and file attachments. You can store SSH keys, API tokens, configuration files, and any other sensitive data inside the encrypted vault. Additionally, OneCritto includes a dedicated SSH Connection Manager that goes beyond simple key storage: you can save full connection profiles (host, port, username, key) and launch SSH sessions directly from the app with a single click.

Related articles

• Offline vs Cloud Password Manager: Why Local Vaults Are Safer
• Local Password Manager: Store Credentials Offline in an Encrypted Vault
• How to Store Passwords Without the Cloud
• Password Manager With No Subscription