An EVM-equivalent zkEVM Layer 2 testnet on Ethereum, Linea Sepolia (Chain ID 59141) provides low fees, rapid finality, and uses ETH gas for dApp testing.
Linea Sepolia is the public zkEVM testnet for Linea, anchored to Ethereum’s Sepolia and designed to mirror Linea mainnet behavior. It’s used to deploy and load‑test Solidity/Vyper contracts, cross‑chain bridge flows, wallets, and indexing/infrastructure before mainnet. For testing, expect seconds‑level L2 block times (~2–4s), tens‑to‑low‑hundreds TPS, and near‑zero cost transactions (paid in test ETH; Linea mainnet fees are typically cents), with activity varying by test cycles.
Linea Sepolia stands out with Ethereum‑equivalent zkEVM execution, L1 data availability, and ZK proofs, delivering L1‑grade security with low fees and fast finality. It integrates tightly with the ConsenSys stack (MetaMask, Infura, Truffle/Hardhat) and preserves Ethereum gas semantics, so contracts port without code changes. Compared to L1 (~12s blocks and dollar‑level fees under load) and many testnets, Linea Sepolia offers seconds‑level blocks and higher sustained TPS, making it ideal for high‑frequency dApp and bridge simulations.
Linea Sepolia uses ETH as the gas token for transaction fees. You can obtain ETH by bridging from other chains or purchasing using thirdweb Bridge, or through faucets (for testnet).
To bridge ETH to Linea Sepolia, connect your wallet to thirdweb bridge, select your source chain, choose the token you want to bridge, select Linea Sepolia as the destination, enter the amount, and confirm the transaction. The bridge will handle the cross-chain transfer instantly.
To build on Linea Sepolia you can use thirdweb, which provides an easy way to build, monetize and scale your apps, games or agents. You can find detailed guides and documentation on https://portal.thirdweb.com to get started quickly.
To add Linea Sepolia to your wallet, you can connect your wallet and click on [Add to Wallet] button at the top of the page. Alternatively, you can add the network manually using the RPC URL and chain details and add it to your wallet's network settings.
To send ETH on Linea Sepolia, ensure your wallet is connected to the Linea Sepolia network, enter the recipient's address, specify the amount of ETH to send, review the gas fee, and confirm the transaction in your wallet.