Online web3 tools using web3.js for support your dapps development
web3.utils.isAddress(address)
Checks if a given string is a valid Ethereum address. It will also check the checksum, if the address has upper and lowercase letters.
web3.utils.toChecksumAddress(address)
Will convert an upper or lowercase Ethereum address to a checksum address.
web3.utils.checkAddressChecksum(address)
Checks the checksum of a given address. Will also return false on non-checksum addresses.
web3.utils.toWei(number [, unit])
Converts any ether value value into wei.
web3.utils.fromWei(number [, unit])
Converts any wei value into a ether value.