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What is this tool?

This tool helps you check if a word is part of the official BIP39 English word list used in Bitcoin wallets for generating seed phrases (mnemonics).

We currently only support the English version of the BIP39 word list, which contains exactly 2048 unique words standardized for secure phrase generation.

As you type, the input will validate whether the word is part of the list, and show suggestions that match what you're typing.

If the word isn't valid, we suggest similar English words using the Datamuse API — an open API for finding related words based on spelling and pronunciation.

When a valid word is found, we also show how frequently it appears in written English using data from Google Books Ngram Viewer. For example: "alien" appears 9.42 times per million words.

This frequency is just an indicator of how common the word is in books, and has no effect on its strength or suitability in a BIP39 seed phrase.

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