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.
A rigorous breakdown of the mathematical equations, market assumptions, and step-by-step calculations powering this tool.
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.
Step-by-step workflow instructions to get the most accurate calculations for your trading strategy.
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.
