BIP39 Passphrase

Generate or inspect a BIP39 passphrase locally. Entropy & strength meter, Unicode NFKD normalization, RNG choices, dice/coin input, clipboard auto-clear, panic wipe, and optional mnemonic → seed (PBKDF2-HMAC-SHA512).

Controls
Mode
Type
Words
Separator
Casing
Advanced Controls
Passphrase
Normalization
Shown
NFKD
Strength
0.00Entropy (bits)
0Length
weakStrength

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This runs entirely in your browser—no network calls. Use dice/coin inputs for deterministic entropy, or the secure WebCrypto RNG. For safety, clipboard auto-clear and panic-wipe are included.

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