Verify the checksum of a BIP39 seed phrase locally in your browser. Instantly check if a 12 or 24-word phrase is cryptographically

Convert between gwei, wei, and ether denominations with precise BigNumber arithmetic and formatting.

Inspect Shadow DOM elements with tree view, host highlighting, and nesting depth tracking.

Cancel a pending Ethereum transaction by replacing it with a zero-value self-transfer using the same nonce.

Swap ETH for USDC directly through Uniswap V2. Get live quotes, set slippage tolerance, and execute trades with a single click.

Convert between Solana lamports and SOL denominations with precise BigNumber arithmetic.

Speed up a pending Ethereum transaction by replacing it with a higher-gas-price self-transfer using the same nonce.

Swap BNB for BUSD on PancakeSwap V2. Get live quotes, set slippage, and execute trades on BNB Smart Chain with one click.

Convert Unix timestamps (seconds or milliseconds) to human-readable dates with UTC and local timezone support.

Create a watch-only wallet in MetaMask from your connected address with step-by-step instructions.

Swap MATIC for USDC on QuickSwap V2. Live quotes, slippage control, and one-click execution on Polygon network.

Decode ABI-encoded data using Solidity function signatures and types, extracting arguments and events.

Check your connected wallet's native currency balance (ETH, MATIC, BNB, AVAX, etc.) on any EVM network.

Bridge ETH from Ethereum Mainnet to Arbitrum via the official Arbitrum bridge. Fast, secure L2 onboarding with one click.

Encode function calls with ABI specification, converting arguments to EVM-compatible hex data.

Check ERC-20 token balances for your connected wallet using custom token addresses on any EVM network.

Bridge USDC from Ethereum Mainnet to Base via the official Base bridge. Fast, secure L2 onboarding with automatic approval handling.

Decompile EVM bytecode to human-readable opcodes with instruction addresses and operand display.

Bridge ETH from Ethereum Mainnet to Optimism via the official Optimism bridge. Fast L2 onboarding with low fees and one-click

Check ERC-721 and ERC-1155 NFT holdings for your connected wallet using custom contract addresses on any EVM network.

Validate Ethereum address format and EIP-55 checksum, with checksummed address generation.

Bridge DAI from Ethereum Mainnet to Polygon via the official PoS bridge. Low fees, automatic approval, and secure L2 transfers.

Validate Bitcoin address formats including P2PKH, P2SH, and Bech32 with type detection.

View your wallet's transaction history with chunked scanning that adapts to RPC limits automatically.