Where and how securely does PassKub store my passwords?

Every password and PIN is encrypted on your own device first using Argon2id key derivation and AES-256-GCM authenticated encryption before it ever touches storage — PassKub and its servers only ever see ciphertext, never your plaintext passwords.

How does Quick Fill send a password to another device securely?

Quick Fill relays an end-to-end encrypted, short-lived, one-time request between your devices (by code or QR) so a credential can be filled on a new device without ever creating a cloud account or exposing the vault.

Offline-first · Zero-knowledge sync

Your passwords, protected — everywhere you go.

PassKub keeps every password and PIN encrypted on your own device first, with an optional Premium cloud sync that even we can't read. One clean vault, on Android, iOS, Windows, macOS, and your browser.

Download free View packages

AES-256-GCM encryption
Argon2id key derivation
Works fully offline
No sign-in required to use

Manage every password, store it securely, and never worry about a forgotten password again.

Android

iOS

Windows

macOS

Chrome

Edge

Firefox

Safari

See it in action

The real app — on your desktop and in your pocket.

Actual PassKub screens, not renders. Switch tabs to preview a quick walkthrough of sending a credential from Windows to Android.

Every credential lives in one searchable vault — organized by tag, on every platform.

PassKub vault open in the Windows app, listing saved logins such as My Admin, My API secret, My Apple, My Database and My Google.

The Request Quick fill window floating over the Windows desktop, showing a green two-digit pairing code to confirm on another device.

The Windows app waiting for the pairing code to be approved on the paired phone.

The same PassKub vault open in the Android app, with the identical saved logins as the desktop app.

The Android app's notifications screen, prompting the user to choose which saved credential to send to the requesting device.

The Android app asking the user to pick the shape and number that matches the desktop's pairing code, to approve the Quick Fill handoff.

Features

Everything a password manager should be — nothing it shouldn't.

Clean, minimal, and secure by default. Every core feature works completely offline, free, forever.

Offline-first vault

Everything stays on-device by default — no account, no server, no internet required.

State-of-the-art encryption

Argon2id key derivation and AES-256-GCM authenticated encryption protect every entry.

Password & PIN generator

Cryptographically secure generation, plus zxcvbn-style strength analysis on everything you store.

QR & NFC handoff

Move a credential from one device to another instantly — no cloud account needed.

Expiry reminders

Set your own lifetimes and get notified before a password or PIN goes stale.

Optional cloud sync

Premium adds end-to-end encrypted sync across every device — we only ever store ciphertext.

Try it yourself

Test Quick Fill with your real devices

This is the real thing: sign in with the same account as an active trial device, then send a test value between two real devices.

Encryption playground

Lock a secret, then unlock it.

1Secret

Type or generate a secret…

2Keypass

Choose a keypass

3Unlock

Drop file, or

Keypass

Real device test

Requires an account with an active trial device.

1Sign in with your account

2Choose this device/tab's role

Download

Get PassKub on every device you use.

No sign-in required to download or use the free tier. Latest version —

Mobile

Android & iOS

Download APK Get it on Google Play

Download on the App Store

Desktop

Windows & macOS

Download installer (.exe) Download portable (.exe)

Download for macOS (.dmg)

Browser extension

Chrome, Edge, Firefox & Safari

Chrome Web Store

Edge Add-ons

Firefox Add-ons

Safari Extensions

Packages

Start free. Upgrade only if you need sync.

Exact prices and subscription lengths are shown in the app, the extension checkout, or the relevant app store before you pay.

Free

Everything you need, fully offline

Unlimited passwords & PINs
Argon2id + AES-256-GCM encryption
Custom categories
Password & PIN generator + strength meter
Expiry reminders
One-time QR / NFC device transfer

Download free

Premium

Everything in Free, plus cloud sync

Everything in Free
End-to-end encrypted cloud sync across devices
Guided device migration
Continuous backup — no local-only single point of failure
Priority support
Monthly or yearly billing, cancel anytime

Get Premium

Business

Shared vaults for teams

Everything in Premium
Team vault with per-member roles
Seat pool & managed licensing
Enterprise SSO (OIDC)
Allowed email-domain restrictions
Centralized admin console

Contact sales

FAQ

Good to know

Do I need an account to use PassKub?

No. The Free tier works fully offline with no sign-in. An account is only created when you choose to enable Premium cloud sync.

Can PassKub read my passwords?

No. Your keypass (master password) never leaves your device, and vault data is always encrypted with a key only you hold — including when Premium sync stores ciphertext on our servers.

What happens if I forget my keypass?

Because we never see your keypass or an unencrypted vault, there is no "forgot password" recovery for the vault itself — keep your keypass safe.

Which platforms are supported?

Android, iOS, Windows, macOS, and Chrome/Edge (with Firefox and Safari extension support). The same encrypted vault format works everywhere.

Can I cancel Premium anytime?

Yes. Premium subscriptions are billed by the store you subscribed through (Stripe, Apple App Store, or Google Play) and can be cancelled at any time from that platform.