Blockchain tools
Crypto and Web3 tools. All tools are free and run in your browser.
ETH Gas Tracker
Live Ethereum gas prices — slow, standard and fast.
Crypto P&L Calculator
Calculate your crypto profit and loss from any trade.
Wei / Gwei / ETH Converter
Convert between Wei, Gwei and ETH instantly.
ABI Decoder / Encoder
Decode and encode Ethereum ABI data for smart contracts.
Wallet Age Checker
Check how old any Ethereum wallet address is.
Crypto Tax Estimator
Estimate capital gains tax on your crypto trades.
Crypto Portfolio Tracker
Track your crypto holdings with live prices and P&L.
Crypto Watchlist
Watch live crypto prices with custom target alerts.
DCA Calculator
Calculate returns from dollar cost averaging into any crypto.
Crypto Fear & Greed Index
Live crypto market sentiment — from extreme fear to extreme greed.
Smart Contract Reader
Interact with any smart contract using its ABI — no coding needed.
Solana Transaction Decoder
Decode any Solana transaction into human-readable instructions.
Multi-Wallet Balance Checker
Check token balances across multiple wallets in one view.
BIP39 Mnemonic Generator
Generate and validate BIP39 mnemonic seed phrases offline.