I use this https://iancoleman.io/bip39/

I run it offline and air gapped you can use your seed in say Sparrow and Electrum to check if the addresses match ? if your worried about Entropy use a Passphrase and or a 2/3 or 3/5. But happy I'm with Coldcard/Dice generated seeds as well.

Multisig solves a lot of theses issues.

I would not use a Connected web based seed generator.