best way to generate btc wallet with mnemonic phrase
You can click 'Generate' on this page (although I highly don't recommend using the online version, see below for more) to generate mnemonic phrases and use them. The site supports several languages, multiple currencies not just Bitcoin &amp; more.
The site is also open source and I highly recommend using this offline than the online one for obvious security reasons: https://github.com/iancoleman/bip39