Paste a password to estimate its strength: length, character-class mix, entropy in bits, and warnings for common patterns (sequences, repeats, keyboard runs, dictionary words). The check runs entirely in your browser — the password is never transmitted, logged or stored. Use it to harden passwords before saving them in your manager.
🔒 Your file is processed locally in your browser whenever supported. This tool runs entirely on your device — nothing you type or upload is sent to a server, logged, or stored.
For online accounts, 60+ bits is a practical floor; 80+ bits is comfortable for high-value secrets. Entropy depends on true randomness — a long passphrase of random words often beats a short 'complex' password.
No. Analysis happens in JavaScript in your tab. Nothing is sent to a server. Close the tab and the value is gone from the page.
No. Strength does not protect against breach reuse. Generate a unique password per site (see the password generator) and store them in a password manager.
| Platform | Supported | Offline | Local | Server | Network |
|---|---|---|---|---|---|
| WEB | Yes | Yes | Yes | No | Not required |
| PWA | Yes | Yes | Yes | No | Not required |
| ANDROID | Yes | Yes | Yes | No | Not required |
| IOS | Yes | Yes | Yes | No | Not required |
Create strong random passwords locally. Nothing is stored or sent anywhere.
Compute SHA-256, SHA-512 and fast non-crypto checksums of any text, locally.
Generate secure hex tokens for API keys and secrets (local randomness only).
Generate version-4 UUIDs locally using cryptographically secure randomness.
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