Crypto & Web3 Tools

Free tools for Ethereum, Web3, and security: unit conversions, gas estimation, token math, wallet validation, hashing, and certificate inspection. All run locally in your browser.

ETH Unit Converter

Convert between Wei, Gwei & Ether

Gas Fee Calculator

Calculate Ethereum gas costs in USD

Token Decimal Calculator

Convert raw token amounts to readable values

Wallet Checksum Generator

Validate & checksum Ethereum addresses

Solidity ABI Encoder

Encode function selectors & parameters

Keccak256 Generator

Multi-hash generator with SHA & Keccak

Hash Generator

Generate MD5, SHA-1 & SHA-256 hashes

Bcrypt Generator

SHA-256, SHA-512, SHA-1 with salt support

Password Generator

Generate strong random passwords

Password Breach Checker

Check if passwords appear in known breaches

Hash Identifier

Identify hash types from sample strings

Public Key Fingerprint

Generate SSH key fingerprints

TLS Certificate Decoder

Decode and inspect TLS/SSL certificates