Free Testnet Faucets for Web3 development

How to get test tokens from faucet?

In order to receive a drop of testnet tokens, you need to find an active faucet, sign up (in some cases) and input a valid crypto wallet public address. Then, you need to approve the operations by clicking ‘Continue’. That’s it: testnet crypto will be dropped into your wallet soon. Please keep in mind that in no way test tokens can be sold or exchanged to ‘real’ ones that exist in mainnets. They have no value and can only be used for testing purposes.

How does crypto faucet work?

Mainstream testnet faucets are set to allow developers and entrepreneurs to claim free crypto coins for their experiments. As such, they come to a faucet’s website, sign up and claim free testnet tokens.

What are the benefits of using a crypto faucet?

Once they get faucet tokens, developers can experiment with blockchain-based applications with no risks of losing funds that belong to their users. Developers can stress-test all possible designs of attack against their products in a cost-efficient and risk-free manner. For instance, DeFi developers interested in studying the behavior of their liquidity pools won’t need to risk by injecting real liquidity during the testnet phase. Also, Web3 students can create their first tokens in testnets with no need to pay gas costs for the contract that is only required for training.

How does the crypto faucet send coins to the user address?

Here's how Sepolia faucet can drop Ether to the addresses that claimed it on services like that: // Send ether to the specified address
function sendEther(toAddress) {
        // Get the latest gas price
        web3.eth.getGasPrice().then(function(gasPrice) {
                // Calculate the transaction fee
                const gasPriceHex = web3.utils.toHex(gasPrice);
                const gasLimitHex = web3.utils.toHex(21000);
                const valueHex = web3.utils.toHex(web3.utils.toWei('0.1', 'ether'));
                const nonce = web3.utils.toHex(web3.eth.getTransactionCount(faucetAccount.address));
                const txParams = {
                    nonce: nonce,
                    gasPrice: gasPriceHex,
                    gasLimit: gasLimitHex,
                    to: toAddress,
                    value: valueHex,
                    data: '0x'
                };

                // Sign the transaction with the faucet account's private key
                const tx = new Tx(txParams, { 'chain': 'Sepolia' });
                tx.sign(faucetAccount.privateKey);

                // Serialize the signed transaction and send it to the Sepolia Testnet
                const serializedTx = tx.serialize();
                web3.eth.sendSignedTransaction('0x' + serializedTx.toString('hex')).then(function(receipt) {
                        console.log('Transaction hash:', receipt.transactionHash);
                        console.log('Gas used:', receipt.gasUsed);
                }).catch(function(error) {
                        console.error('Transaction error:', error);
                });
        });
}

// Send ether to the specified address
sendEther('0xYourAddress');