How to Create a Bitcoin Address from Ethereum via Metamask

Hey everyone, Been a minute since I posted. So, I'm in a bit of a jam here. Last year, I linked my Metamask wallet (which is on Ethereum) to a web3 site that used my Ethereum address or its private key to create a Bitcoin address. This let me use Metamask with Bitcoin. Now I see they have these "snaps" but that wasn’t the case back then. It was around the early days of Ordinals. Anyone remember that website? Even if it’s gone now.

What? Never heard of a site that does that! Are you sure you got a Bitcoin address? What’s the first three characters of it? Legacy or Bech32 format? Why not just export the private key from Metamask and import it into a Bitcoin wallet like Electrum?

Yep, I’m certain. Can’t recall the exact format, but it might’ve been Segwit (3) or Bech32. Google isn’t helping much. I’ll look into Electrum, but I’m iffy on Zion's method since it sounds like an online form. Appreciate the help! Edit: Just found out Justsnap used the extended pubkey as Metamask snap, so that part’s cool. But still no luck.

Honestly, it's risky to create addresses for different coins from an Ethereum address or vice versa! They never explain how they generate that address. If their service goes down, you could lose access to your funds completely even with the private key. Better to use your seed phrase and derive a Bitcoin address with the right derivation paths like m/'44/0'/0' or m/84'/0'/0'.

Thanks for that tip. I downloaded that mnemonic code converter from iancoleman’s GitHub and pasted my Metamask seed into it. But it’s not showing Taproot addresses... Can I do anything with the info I’ve got? Like using that BIP32 Extended Public Key in Bitcoin Core or via CLI?

Nah, you can’t. The Metamask interface doesn’t support Bitcoin addresses properly. So you’ll just get an address to receive payments, but spending from it will mess you up. Plus, you mentioned a web3 site, which means your private key's tied to that site they could log it. Try searching this forum because search engines don’t always pull up dead sites. Found this topic, and it links to an archived site check it out.

Even if the same BIP and seed word list is used, you really shouldn’t mix wallet tools or software with the same wallet seed or private key. Different teams build these tools, and you never know which ones are secure. Mixing them increases the risk of losing your coins if one of them gets compromised.

Appreciate the advice but I know what I'm doing. No worries it’s a hot wallet (Metamask), while my actual funds are safely on a hardware wallet. I’m just experimenting with new stuff and forgot to note the web3 site I connected to. I think it was generative (dot) xyz, but it still gives a wrong BTC address. Looking for a tool to change the derivation path from a BTC private key or seed phrase, trying to get that correct Taproot address.

Thanks for the suggestions, but not quite what I need. Metamask can get you a Bitcoin address with their "Snaps" now, but it didn’t provide the correct Taproot address. I feel it’s got to do with derivation paths. Generative (dot) xyz also gives a different BTC address.

You gotta remember, the asymmetric cryptography in Ethereum is basically the same as Bitcoin's. They use the same elliptic curve and algorithm to generate keys. But seriously, why do you think it’s not the "correct" address? What are you basing that on? There are actually two ways to generate a Taproot address from the same key, and both could be valid.

Did you mean the Unisat wallet? Check out their GitHub.

Yeah, Unisat wallet is for Ordinal BRC20 tokens. They’ve got their site linked above. BRC20 tokens are still around, and they’re not dead yet. Just wait for the next bear market in 2026 to see which ones fall off.