How the 24 words are selected
Each position is selected independently with the browser’s cryptographic random-number generator from the 7,776-entry EFF long word list. Repeated words are possible and should not be manually replaced.
How much entropy do 24 random words provide?
Twenty-four independent selections from 7,776 possibilities provide approximately 310.2 bits of entropy. Spaces, hyphens, dots, underscores, and capitalization are formatting choices and do not add randomness.
Why this is not BIP39
A BIP39 recovery phrase uses a specific 2,048-word list and encodes wallet entropy plus a checksum. This generator uses the EFF list and does not implement that structure, so its output is not a valid substitute for a wallet-generated recovery phrase.
When to use a 24-word passphrase
Use it only where very long credentials are accepted and practical to store in a password manager. Many accounts impose maximum lengths or reject spaces, so verify the destination’s rules before saving the result.
Keep the generated order
The word order is part of the random result. Removing, sorting, or replacing words reduces the documented search space. Generate a new result instead of editing one into a personal phrase.