Web3 & Blockchain
Free, private, runs in your browser
EVM contract reader with Uniswap presets, vanity address generator, multi-chain readers for Solana, Polkadot, Cardano and Cosmos, Keccak-256 hasher, ABI tools, ENS calculator, and chain-specific tool pages.
Smart Contract Dev
Passkey Address Deriver
Derive EVM addresses from P-256 passkey public keys. For Ritual Chain TxPasskey and WebAuthn wallets.
DKMS Key Visualizer
Visualize how Ritual agents derive identity keys via DKMS from TEE-held roots to purpose-specific keys.
X402 Payment Encoder
Encode and decode X402 payment payloads for agent-to-agent transactions. Build HTTP 402 challenges.
EVM Calldata Decoder
Decode raw Ethereum calldata and error data against a built-in signature dictionary (ERC-20, permit, routers, standard errors), or by pasted ABI. Event topic0 lookup included.
CREATE2 Address Calculator
Compute deterministic CREATE2 deployment addresses from factory, salt, and init code hash. Keccak math identical to the EVM, all client-side.
Uniswap Tick & SqrtPrice Calculator
Convert between Uniswap v3 price, tick, and sqrtPriceX96 with token decimals. Exact Q64.96 integer math matching TickMath.
EIP-1967 Proxy Slot Checker
Read the standardized proxy storage slots — implementation, admin, beacon — for any contract across 21 EVM chains. Read-only eth_getStorageAt.
Solidity Storage Slot Calculator
Compute storage slots for Solidity variables, mappings (keccak of key and slot), and dynamic array elements. Exact EVM slot math.
Uniswap v4 Hook Calculator
Compute the v4 hook permission bits and the address prefix to mine, or decode any hook address into its 14 hook-call permissions.
Ethereum Transaction Decoder
Decode raw signed transactions (legacy, EIP-1559, EIP-2930, EIP-4844) into typed fields: nonce, gas, to, value, calldata selector, signature.
Function Selector Calculator & Lookup
Compute 4-byte Solidity function selectors with Keccak-256, or reverse-lookup a selector to its function. ERC presets and batch mode for ABI work.
ENS Namehash Calculator
Derive EIP-137 namehash and labelhash values for any ENS name, with the full derivation chain.
Solidity to Opcodes
Compile Solidity to EVM opcodes.
ABI Encoder & Decoder
Encode/decode Solidity ABI parameters, function selectors, and transaction calldata.
BLS12-381 Signature Generator & Verifier
Generate BLS12-381 signatures, verify signatures, and aggregate multiple signatures into one. 100% client-side, privacy-first.
DeFi & Trading
Impermanent Loss Calculator
Calculate IL for any price change. Compare HODL vs LP value with fee offset analysis.
ERC-4626 Vault Analyzer
Simulate ERC-4626 vault math with exact spec rounding (shares, dust, inflation attack) and read live vaults on-chain: share price, totals, convertTo checks. Works for Morpho, Yearn, Beefy, any vault.
APY Calculator
Convert APR to APY with any compounding frequency. Compare DeFi yields accurately.
RWA Asset Swap
Swap RWA tokens, stablecoins, and native assets across 15+ EVM chains. Cross-chain routing via LI.FI.
RWA Tokenization Lab
Deploy ERC-20 mirror tokens for stocks (AAPL, AMZN), fractional ownership contracts, and custom tokenization contracts on-chain via MetaMask or Rabby.
Addresses & Keys
Vanity Address Generator
Generate Ethereum addresses with a custom prefix or suffix. Keys are created in your browser and never transmitted.
Cosmos Address Generator
Generate addresses for Cosmos Hub (ATOM), Osmosis (OSMO), Juno (JUNO), Akash (AKT), Injective (INJ), Kava, Stargaze, Secret Network and more from BIP39 seed phrases.
Multi-Chain Wallet
Generate keys & addresses for multiple blockchains from one mnemonic, derive addresses from keys, and validate checksums.
CloudHSM Key List & EVM Address
List keys in AWS CloudHSM (cloudhsm-cli, key_mgmt_tool, PKCS#11), inspect key attributes, and derive the EVM wallet address from an secp256k1 public key. Free, client-side.
Address Checksum (EIP-55)
Validate and checksum Ethereum addresses. Prevent spoofed address attacks.
Private Key to Address Converter
Derive addresses for Ethereum, Bitcoin, Solana, and more from a private key. Runs entirely in browser.
BIP39 Passphrase
Generate BIP39 mnemonic phrases for cryptocurrency wallets.
Chain Readers
EVM Contract Reader
Paste an ABI and call view functions on any deployed contract via your own RPC endpoint. Works on every EVM chain.
Solana Account Reader
Look up Solana accounts, decode SPL token accounts, and derive PDAs - client-side via any Solana RPC.
Polkadot Substrate Reader
Substrate chain info, raw storage queries, and SS58 address conversion for Polkadot, Kusama, and local nodes.
Cardano Address Reader
ADA balance, UTxO count, and stake info for any Cardano address via the keyless Koios API.
Cosmos Account Reader
ATOM and token balances, delegations, and rewards for any Cosmos SDK account - plus a bech32 converter for every chain prefix.
Utilities
Browse by chain
Ethereum
ETH · ID 1
Arbitrum
ETH · ID 42161
Base
ETH · ID 8453
Optimism
ETH · ID 10
Polygon PoS
POL · ID 137
BNB Smart Chain
BNB · ID 56
Avalanche C-Chain
AVAX · ID 43114
zkSync Era
ETH · ID 324
Linea
ETH · ID 59144
Blast
ETH · ID 81457
Mantle
MNT · ID 5000
Cronos
CRO · ID 25
Ritual
RITUAL · ID 1979
HyperEVM
HYPE · ID 999
Katana
ETH · ID 747474
Monad
MON · ID 143
Robinhood Chain
ETH · ID 4663
Unichain
ETH · ID 130
Stable
USDC · ID 988
Tempo
ETH · ID 4217
World Chain
ETH · ID 480