Authorized use only. Use this tool solely on systems, tokens, and assets you own or are explicitly permitted to test — credential extraction, signature forging, and unauthorized access are prohibited by our Acceptable Use Policy.

EVM Tools

Base Developer Tools

Coinbase's OP Stack L2. Fast, cheap, and deeply integrated with Coinbase's user base. All our EVM tools — from the Contract Reader to the Keccak-256 hasher — work natively on Base.

Chain details

Chain ID

8453

Native token

Ether (ETH)

Type

L2

Gas

Gas ~100x cheaper than Ethereum L1

RPC endpoint

https://mainnet.base.org

Block explorer

https://basescan.org

Tools for Base

Every tool below works on Base and every other EVM chain — read any Base contract, decode Base calldata before signing, or convert wei to ETH with exact math. All client-side — keys and payloads never upload.

EVM Contract Reader

Call view functions on any Base contract via your own RPC

EVM Calldata Decoder

Decode Base transaction input — function and arguments, before you sign

Transaction Decoder

Break out a signed Base transaction: sender, gas, fees, calldata

ABI Encoder & Decoder

Encode calldata for Base contract interactions

Function Selector Calculator

Compute 4-byte selectors for function signatures

EVM Unit Converter

Convert wei, gwei, and ETH with BigInt-exact math

Vanity Address Generator

Generate custom addresses — same key works on Base and every EVM chain

Address Checksum (EIP-55)

Validate and checksum Base addresses to catch typos

CREATE2 Address Calculator

Derive deterministic contract addresses before deploying to Base

EIP-1967 Proxy Slot Checker

Read implementation and admin slots of Base proxies

Storage Slot Calculator

Compute Solidity storage slots for Base contract state probes

Uniswap Math Calculator

v2/v3/v4 pool math — amounts out, ticks, sqrtPrice

Uniswap v4 Hook Calculator

Map hook addresses to their permission flags

Keccak-256 Hasher

Hash with the exact algorithm used by the EVM

Multi-Chain Wallet Generator

Generate keys and Base addresses from one mnemonic

ENS Namehash Calculator

Derive EIP-137 namehash values for ENS names

Solidity to Opcodes

Compile Solidity and inspect the EVM assembly

Popular tokens on Base

USDC

0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

6 dec

DEGEN

0x4ed4E862860beD51a9570b96d89aF5E1B0Efefed

18 dec

WETH

0x4200000000000000000000000000000000000006

18 dec

Other EVM chains

All tools work on every EVM chain — pick yours: