hxxe tools: free web3 developer tools for EVM and Solidity
all tools
Send & fix4
Look up9
ABI & calldata7
Trading3
Units & gas3
Hashing & encoding5
Storage & deploys6
Addresses, signatures & time6
Made by haze1
what each tool does · 44
Send & fix
gas refuelout of gas on a new chain? bridge a little from where you have some, in one tx.
HyperEVM big blockscheck and switch an address between big and small blocks.
stuck transaction fixerwhy is my tx pending? find out, then speed it up or cancel it with the right gas.
raw transaction decoderdecode a signed raw tx: sender, nonce, fees, calldata, hash. then broadcast it.
Look up
HyperCore precompile readercall any L1Read precompile live, with the numbers scaled for humans.
Core ↔ EVM bridge resolverany token’s system address, evm contract and decimals, plus the exact transfer to send.
Robinhood stock tokensevery stock token on robinhood chain: live price, contract, multiplier, chainlink feed.
stock token dividendsupcoming and paid dividends on robinhood chain stock tokens, and what yours pays.
transaction inspectorpaste a tx hash: chain found automatically, everything decoded.
contract inspectorwallet or contract? proxy implementation, clones, 7702, token info.
ENS lookupname ↔ address, avatar, x, github and website records.
read contractany contract on 13 chains: finds the verified abi and reads every view function.
multi-chain balancesgas tokens, stablecoins and wrapped eth / btc for any address on 13 chains, in usd.
ABI & calldata
selector & topic calculatorsignature → 4-byte selector, event topic0, error selector. and back.
calldata decoderpaste tx input data, get the function and every argument, decoded.
revert reason decoderturn 0x08c379a0… and panic codes into plain english.
ABI encodersignature + arguments → calldata, abi.encode or encodePacked.
CoreWriter action builderbuild sendRawAction bytes for orders, transfers, staking. or decode a tx’s actions.
ABI to interfacepaste an abi, get a solidity interface with structs.
event log decoderpaste a log or a whole receipt, get every event decoded.
Trading
hyperliquid account viewerany hyperliquid address: positions, pnl, liq prices, spot balances and open orders.
liquidation price calculatorliquidation price for any hyperliquid perp, using live max leverage and mark price.
hyperliquid funding ratesevery hyperliquid perp’s funding rate: hourly, 8h and annualized, vs binance and bybit.
Units & gas
Hashing & encoding
keccak256 hasherkeccak256 and sha256 of text or raw hex bytes.
hex converterhex ↔ decimal ↔ binary, text ↔ hex ↔ bytes32, two’s complement.
EIP-712 typehash & hasherstructs → typehash, domain separator, digest and the solidity to hash them.
rlp encoder / decoderdecode rlp hex into a readable tree, or encode nested lists back to rlp.
userop & 7702 hash calculatorerc-4337 userOpHash for entrypoint v0.6–v0.9, and eip-7702 authorization hashes.
Storage & deploys
storage slot calculatormapping and array slots, erc-7201 namespaces, proxy slots.
contract address calculatorpredict deploy addresses from deployer + nonce, or salt + initcode.
merkle tree builderallowlist or airdrop rows → root and proofs, openzeppelin style.
bytecode disassemblerbytecode or address → opcodes, functions, compiler, red flags.
storage layout & packingsee every slot, find wasted bytes, get an order that saves gas.
vanity address minermine create2 salts or wallet keys for an address that starts or ends with your hex.
Addresses, signatures & time
address checksumvalidate an address and get its eip-55 checksum.
unix timestamp converterblock.timestamp ↔ date, durations in seconds, relative time.
signature verifierwho signed this? personal_sign, eip-712, split and compact.
Safe transaction hashcheck the safeTxHash your ledger shows before you sign. batches decoded.
block by datefind the block at any date or unix timestamp on 13 chains, or when any block was made.
what am i signing?paste a wallet signature request, get it in plain english with risk flags.
need the contracts, not just the tools?
solidity for apps & games: foundry-tested, gas-aware, handed over with docs.