I present the BIP39 word stream.

What it does

It displays one random word from the official BIP39 word list (the 2048 words used for cryptocurrency seed phrases) at a time, in large text on screen. Every few seconds (default 10s), the current word fades out and a new one appears with a smooth pop animation.

The key feature is the "pepper" field:

You can type any extra passphrase (locally only — never sent anywhere).

This pepper is mixed with strong cryptographic randomness (crypto.getRandomValues) and a counter to generate each word.

The result is a cryptographically biased-random selection of BIP39 words, useful for people who want to add personal entropy to a seed-generation process while watching words appear slowly.

https://allesvoorbitcoin.be/21tools/bip39wordstream/