Hash Tools

Generate hashes and checksums instantly: MD5, SHA-1/256/512, HMAC and more. Verify files and secure data right in your browser.

7 tools available

Blockchain Tools 2

Keccak SHA3 Hasher

Generate Keccak-256, Keccak-512, SHA3-256, SHA3-512 hashes online. Free Ethereum-compatible hash tool for smart contracts and blockchain development.

Solidity Function Selector

Generate Solidity function selectors and event Topic0 hashes from signatures. Encode 4-byte selectors, lookup common ERC20 and DeFi signatures.

Developer Tools 4

Encoding 4

MD5 Hash Generator

Free MD5 hash generator and checksum verifier. Generate an MD5 from text and paste an expected MD5 to verify downloads — instant MATCH or MISMATCH.

SHA-1 Hash Generator

Generate a SHA-1 hash from text or a file and verify it against a published SHA1SUM checksum. Match/no-match verdict, runs locally via Web Crypto.

SHA-256 Hash Generator

Generate a SHA-256 hash from text or a file. Verify downloads against a published checksum without uploading the file. Runs locally via Web Crypto.

SHA-512 Hash Generator

Generate a SHA-512 hash from text or a file, then verify it against a published checksum. Runs 100% locally via Web Crypto — nothing is uploaded.

File Tools 1

Hash Checker

Calculate AND verify MD5, SHA-1, SHA-256, SHA-512 file hashes in your browser. Paste the publisher's expected hash and get an instant Match / Mismatch result.