How to Generate Strong Passwords Offline
Need a strong password? Generate one locally on your computer — never sent to a website — and learn how to store it safely in a free offline password manager.
10 minutes · uses Password Generator · Last updated 2026-10-17
Step 1: Generate offline, on your own machine
Run Password Generator with a long length. Twenty characters of mixed types is a reasonable default; 24 or more is better for a master password. The tool draws from your operating system CSPRNG and prints to the screen only.
Real output from a run on our test machine6wM/G}6&o6)-2qL]rEBJ
e(k;!oX/w43U(QP[,GZ/
j!*CVGp9}m/v2Ds?y@X:
Tip: generated in memory only. Paste directly into your password manager; do not save it to a text file.
Step 2: Store it in an offline manager
Put the password into KeePassXC (or another manager you trust) immediately. An offline database file you control beats a cloud vault if your threat model includes the provider. Take an encrypted backup of the database and store it somewhere you would also store a passport.
Step 3: One unique password per site
Generate a separate password for every account. The point of a manager is that you never need to remember any of them — you only need one strong master password, protected by the generator and by the manager's own key file if you want a second factor.
Step 4: Add a second factor where it matters
A strong password is not a substitute for 2FA on email, banking and your manager itself. Prefer an authenticator app or hardware key over SMS.
How to read the results
Numbers only help if you act on them. Use this table to turn a reading into a decision:
| If you see | It usually means | Next step |
|---|---|---|
| Memorable passphrase needed | You must type it by hand occasionally | Use --passphrase, but prefer a longer random string for anything high-value |
| Password leaked somewhere | Reused or breached | Change it everywhere it was reused; check the manager breach report |
| Master password forgotten | No recovery without the database and key | This is the cost of offline storage — keep backups tested |
Where this stops working
The generator does not store, sync or check passwords against breach lists — that is the manager's job. Its built-in word list is small, so for a master password a long random string is stronger than a passphrase from this tool.
Security notes
Generate on a machine you control. Never paste your real passwords into a website. Beware clipboard managers and terminal scrollback. A password manager database is only as safe as its key file and master password — keep both offline and backed up.
Common questions
How long should a generated password be?
Twenty characters of mixed types is a reasonable default; 24 or more is better for a master password. The tool draws from your operating system CSPRNG and prints to the screen only. The password is never sent anywhere.
How should I store the passwords I generate?
Put them into KeePassXC or another offline manager immediately. An offline database you control beats a cloud vault if your threat model includes the provider. Take an encrypted backup and store it somewhere you would also store a passport, and test that the backup opens.
Does the generator check whether a password has leaked?
No. It does not store, sync or check passwords against breach lists; that is the manager's job. If a password may have leaked, change it everywhere it was reused and check your manager's breach report for the rest.