Web3 Tools
6 free web3 tools. Browser-based. No signup. Privacy-first.
What is Web3 Tools?
Web3 tools are browser-based utilities for blockchain and Ethereum development — wallet-address and NFT-metadata validation, EIP-55 checksums, Keccak-256 hashing, Base58 encoding and ETH unit conversion. They run client-side, so keys and addresses never leave your device.
What are Web3 tools?
Build and debug on Ethereum and other chains: validate a wallet address or NFT metadata, apply an EIP-55 checksum, hash with Keccak-256, encode in Base58, or convert between wei, gwei and ether. Each runs instantly on input you control.
Because everything is client-side, sensitive values like addresses and payloads are processed locally and never uploaded.
Why client-side?
- Privacy: sensitive data (API keys, payloads, passwords) never leaves your device.
- Speed: no network round-trip — results appear as you type.
- Reliability: works offline once loaded.
- Cost: always free, no signup or rate limits.
Browse Web3 Tools
NFT Metadata Validator
Validate NFT metadata against ERC-721, OpenSea, and Solana Metaplex standards. Preview your NFT before minting.
Open toolWallet Address Validator
Validate Ethereum, Bitcoin (legacy + SegWit), Solana, TRON and Litecoin addresses. Format + checksum, no RPC.
Open toolETH Unit Converter
Convert between Wei, Gwei, Ether, Szabo, Finney and more. BigInt-safe — no rounding errors.
Open toolEIP-55 Checksum Tool
Convert any Ethereum address to its canonical EIP-55 checksummed form. Detect typos before sending funds.
Open toolKeccak-256 Hash Generator
Compute Keccak-256 digest (Ethereum's hash) of text or files. Different from SHA-3 — matches Solidity keccak256().
Open toolBase58 Encoder & Decoder
Encode and decode Base58 and Base58Check. Supports text or hex input, used by Bitcoin, Solana, and IPFS.
Open toolPrefer a focused tool?
- Web3 → Browser-based utilities for Ethereum & blockchain development
Frequently asked questions
Are these Web3 tools safe to use with real addresses?
Yes for public data like addresses and metadata — everything runs client-side and nothing is uploaded. Never paste a private key or seed phrase into any online tool, including these.
What is an EIP-55 checksum?
EIP-55 mixes upper and lower case into an Ethereum address as a checksum, so a mistyped address is very likely to be detected. The checksum tool applies and verifies it.
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