Users can download the Core browser extension to access BTC bridging. BTC bridging with the Avalanche Bridge™ is not supported with Metamask or any other wallet. This is because the Core extension was custom-built to support Bitcoin and the Avalanche Bridge™ and to handle the technical problems of linking Bitcoin and EVM chains within a wallet. See here for more details on how to bridge BTC. Do not attempt to use any wallet other than the Core extension for BTC bridging – you may lose all your funds.

What is the Core extension?

Core Wallet Extension is a new alternative to other crypto wallet extensions, such as the Metamask Wallet Extension. Users can use the Core extension to bridge BTC to Avalanche C-Chain or ERC20 tokens to Avalanche C-Chain and back.

To learn more about the BTC bridge, please read the BTC bridge FAQ.

For a more in-depth read on how the Avalanche Bridge works, please read the following articles.

For any additional questions, please visit our knowledge base or contact a support team member via the chat button at

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