BIP39 Mnemonic

Generate BIP39 mnemonic for Bitcoin/Ethereum wallets。 Runs locally—nothing uploaded.

Entropy Bits

Encode and decode Base64, URLs, Unicode, hashes, QR codes, and common developer data formats.

How to use & FAQ

BIP39 Mnemonic: Generate BIP39 mnemonic for Bitcoin/Ethereum wallets. Runs instantly in the browser.

Free, no signup.

Do I need to sign up to use BIP39 Mnemonic?▾

No. All Tools Ku features are free with no registration.

Does BIP39 Mnemonic upload my data?▾

No. Processing happens in your browser; data is not uploaded to toolsku.com.

Production passwords?▾

Use server-side libraries.

Output format?▾

Often hex or Base64—see page.

Does it work on mobile?▾

Yes. For large files, use Wi-Fi for a smoother experience.

Can I download the result?▾

Yes. Copy text output or use the download button when available.