Is it legal to build a website that generates random BIP39 seed phrases and checks their balances?

I’m thinking about building a gimmick website as a kind of interactive explainer about cryptocurrency security. Here’s the concept:

1 - User clicks a button to generate a random 12-word BIP39 seed phrase
2 - The site derives wallet addresses from that phrase
3 - It checks if those addresses have any balance (spoiler: they won’t)
4 - User can click “next” to get a new random phrase and check again

The idea is to show visually how astronomically unlikely it is to randomly generate a wallet that already has funds - like a testament to how secure seed phrases are.