How to view testnets in MetaMask

If you want to use the Ethereum testnets Goerli and Sepolia, head to Settings > Advanced, and make sure 'Show test networks' is turned on: 

MetaMask show test networks

Once this setting is turned on, switch to a testnet by heading to the network selector at the top of the homepage and scrolling until you find the one you need:

MetaMask switch network

If you're using MetaMask Mobile, testnets are listed in the network selector by default. 

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