How many words should I use?

12 words (128 bits) is the common minimum; 24 words (256 bits) gives more headroom. Both are secure when generated with a good random source.

Can I restore a wallet with this phrase?

Yes. Any BIP-39 compatible wallet can import it. Keep in mind that BIP-39 is only the phrase; the wallet's chain and derivation path determine which addresses appear.

Is generating a seed phrase online safe?

Only if the page is trustworthy and runs locally. This page generates the phrase in your browser with no network request, but for meaningful funds the safest option is a dedicated offline device.

Techvoyage

BIP-39 Seed Phrase Generator

Generate a BIP-39 mnemonic seed phrase (12–24 words) locally in your browser. Nothing is sent to a server.

Words

This phrase controls a wallet

Anyone who sees these words can spend the funds. Generate offline if possible, write the phrase down, and never store it in a screenshot, cloud note or password manager field you do not trust.

Generated locally with the scure BIP-39 library and the Web Crypto API. Nothing leaves your device.

About this tool

This tool draws entropy from the browser's Web Crypto API and encodes it as a BIP-39 mnemonic using the standard English 2,048-word list and checksum. Twelve words represent 128 bits of entropy; twenty-four words represent 256 bits. The phrase is generated locally and never transmitted.

FAQ

How many words should I use?: 12 words (128 bits) is the common minimum; 24 words (256 bits) gives more headroom. Both are secure when generated with a good random source.
Can I restore a wallet with this phrase?: Yes. Any BIP-39 compatible wallet can import it. Keep in mind that BIP-39 is only the phrase; the wallet's chain and derivation path determine which addresses appear.
Is generating a seed phrase online safe?: Only if the page is trustworthy and runs locally. This page generates the phrase in your browser with no network request, but for meaningful funds the safest option is a dedicated offline device.