How to Get Testnet ETH on Base Sepolia: Best Faucets and How to Use Them (2026)

What Base Sepolia is and why it exists

Base Sepolia is the test network for Base — an identical chain that runs the same software but uses valueless ETH. Developers deploy contracts, test integrations, and run full transaction flows without spending real money. It is the same relationship as Ethereum Sepolia (the L1 testnet) has to Ethereum mainnet. Base Sepolia replaced the older Base Goerli testnet when Goerli was deprecated.

The chain ID is 84532 (mainnet Base is 8453), the RPC endpoint is https://sepolia.base.org, and the block explorer is sepolia.basescan.org. Everything you can do on Base mainnet — deploy a contract, swap on a test Uniswap, mint a test NFT — works the same way on Sepolia, just with no real value attached. Gas costs the same in gas units; the ETH just is not worth anything.

The working faucets in 2026

Faucets come and go. As of late 2026, these three are reliable:

Alchemy is the one I send developers to first. The 0.1 ETH drip is enough for dozens of contract deployments and hundreds of test transactions, the 24-hour cooldown is generous for a development cycle, and the account takes two minutes to create. Chainlink's faucet gives more per request but the mainnet-balance requirement trips up developers who are new and have not funded their mainnet wallet yet.

The official Base docs at docs.base.org/get-started/get-funds maintain a list of current faucets and sometimes link to new ones. If a faucet above has gone down since I wrote this, start there.

Adding Base Sepolia to your wallet

In MetaMask, the manual entry is: Network Name "Base Sepolia", RPC URL https://sepolia.base.org, Chain ID 84532, Currency Symbol ETH, Block Explorer https://sepolia.basescan.org. Save and switch to it. If you have done this for mainnet Base (the setup guide walks through it), the testnet version is the same steps with the Sepolia URLs.

For other wallets: Rabby and Frame let you add custom networks in similar settings. Coinbase Wallet does not support custom testnets directly — use MetaMask or Rabby for testnet development. On mobile, the MetaMask app supports the same custom network flow.

What testnet ETH is actually for

Three common uses I see in practice:

• Deploying and testing contracts before mainnet. Every contract deployment on Base should be tested on Sepolia first. Deploy, call the functions, run the edge cases — the gas costs are the same in gas units, so you see exactly how expensive your contract is before spending real ETH.
• Testing a wallet or dApp integration. If you are building a dApp or just want to test how a new wallet handles Base transactions, Sepolia lets you click through the full flow without risk. Connect, approve, swap, transfer — all identical to mainnet.
• Learning without losing. Newcomers who want to try sending, swapping, or interacting with a contract but are nervous about losing real money can practice on Sepolia first. The experience is functionally identical; the stakes are zero.

The mainnet-to-testnet mapping is not always one-to-one. Some contracts are deployed on mainnet but not Sepolia (especially newer tokens), and some dApps do not have a testnet deployment. But for core protocol testing — sending ETH, deploying a contract, interacting with a Uniswap fork — Sepolia is fully functional.

Important: testnet ETH has no value

This needs to be said because I see newcomers get confused. Testnet ETH is worth exactly zero dollars. You cannot sell it, you cannot withdraw it to an exchange, and nobody will buy it from you. If someone offers to buy your testnet ETH or asks you to send it somewhere for a return, that is a scam.

The flip side is also important: real ETH sent to a testnet address is not accessible there. If you accidentally send mainnet ETH to your Base Sepolia address, the funds are on Ethereum mainnet (the address is the same — your wallet's address works across all EVM chains), not on Base Sepolia. Switch your wallet to Ethereum mainnet and they will be there. This is a common panic that has a happy ending.

When you are done testing and ready for the real thing, the Base overview and MetaMask setup guide cover the transition to mainnet. The live gas tracker shows what mainnet Base fees actually cost — which, conveniently, are barely higher than testnet.