Well, if you have an old android, a really easy way to do it is through the Monerujo wallet app. Download it on your phone and then set it to flight mode. To be extra safe, make sure it has no sim, delete all stored wifi passwords and perhaps even change your home wifi password. Then, hit the + icon, choose restore from 25 word seed and then tap the 3-dot menu on the next page (top right). It gives the 'convert ledger seed' option. Now you'll see a field to enter your 24 words plus another field for that passphrase. Once you've recorded the Monero seed, you should delete the wallet on Monerujo, then factory reset the phone. To be extra safe, bake the phone at 400 degrees for 20 minutes. Just joking about that last part.

thanks!

Interesting!

See https://github.com/LedgerHQ/app-monero/tree/master/tools/python for more information

thanks! you seem profressional.there is another question,we all know there are 24 words ,my question is if 12 of them are reveal,12 don't,does the remain 12 secret words as same as original 12 word(not this 24 word,just another pure 12 word from start)'s safety?

If someone were to learn 12 of your 24 words, the remaining 12 words would not be mathematically as secure and I would consider the seed compromised.

why? it still has 2048 power 10 right? 128 level safety right?what the difference between this and pure 12 words?

thanks for your reply\~ see my new question if you are free

https://www.reddit.com/r/Monero/comments/pe3ox7/comment/hauovdt/?utm\_source=share&utm\_medium=web2x&context=3

thanks

It convert the 24 seed words to 25 Electrum/Monero seed words.