Secure Password & Seed Generator.
Generate cryptographically random passwords, Diceware-style passphrases, and BIP-39 seed phrases directly in your browser. Shows entropy in bits. Nothing leaves your device.
Understanding your results.
The output shows three types of generated secrets depending on the mode you choose:
- Random password — cryptographically random characters with configurable length and symbol sets. Includes entropy display so you know the strength.
- Diceware passphrase — common words combined into a phrase that is strong yet memorable. Each word adds ~13 bits of entropy.
- BIP-39 seed phrase — standard 12/15/18/21/24-word recovery phrases compatible with hardware wallets. For testing and demo only — do not use with real funds unless you understand key management.
Common mistake: using a generated password once and forgetting to save it. Always store generated passwords in a password manager (Bitwarden, 1Password, KeePass) immediately after generation.
How to use this tool.
Pick your mode: random password (up to 128 characters with configurable symbol sets), Diceware passphrase (common-word combinations for memorability), or BIP-39 seed phrase (the standard 12/15/18/21/24-word recovery phrases used by hardware wallets).
Every output is generated client-side using your browser's cryptographically secure random number generator (crypto.getRandomValues). Nothing is sent to a server, nothing is logged, and the page does not persist state.
Secure your crypto accounts
Generated passwords are only as safe as where you store them. Here's what we recommend:
See how many breaches contain your passwords — private by design, nothing leaves your browser.
Check breach statusStore your seed phrases and crypto securely with the leading hardware wallet.
Get a LedgerPassword & security tool comparison.
| Tool / Service | Type | Cost | Security | KYC | Best for |
|---|---|---|---|---|---|
| Password Generator | Browser tool | Free | Client-side, no data leaves device | None | Generating strong passwords instantly |
| Breach Checker | Browser tool + API | Free | k-anonymity, password never leaves device | None | Checking if passwords were leaked |
| Ledger Hardware Wallet | Hardware device | €79-€199 one-time | Cold storage, secure element chip | None | Generating and storing real seed phrases |
| Bitwarden | Password manager | Free / $10yr Premium | End-to-end encrypted, open source | Email (account) | Storing and autofilling generated passwords |
| 1Password | Password manager | $35yr | Secret Key + Master Password, end-to-end encrypted | Email (account) | Families and teams managing shared credentials |
Affiliate disclosure: Some links on this page are affiliate links. If you click through and make a purchase, AHCrypto may earn a commission at no additional cost to you. We only recommend services we have tested and verified.
Privacy & safety.
Your privacy matters. All generation happens client-side using your browser's crypto.getRandomValues API. Nothing is sent to any server, logged, or stored. You can disconnect from the internet and the tool still works.
Never paste a real wallet seed phrase. The BIP-39 phrases generated here are for testing and demonstration. Never use a seed phrase generated on any website to secure real cryptocurrency funds. For real wallets, always generate the seed phrase directly on a hardware wallet device (like Ledger) or a trusted, air-gapped software wallet.
Use a password manager. Generated passwords are only as secure as how you store them. Copy them immediately into a password manager (Bitwarden, 1Password, or KeePass). Do not store them in plain text files, notes apps, or browser storage.
Safety & alternatives.
Avoid these mistakes
- Don't reuse passwords across accounts. A single breach can compromise every account that shares the same password. Use a unique password for every service.
- Don't store passwords in your browser. Browser-stored passwords are vulnerable to malware and credential-stealing attacks. Use a dedicated password manager instead.
If you prefer a hardware wallet
For cryptocurrency security, a hardware wallet like Ledger generates seed phrases on the device itself — never on a connected computer. This is the gold standard for securing crypto assets. The seed phrases generated by this tool are for testing and education only.
