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

Free keccak256 online tool: compute 4-byte function selectors, event topic0 hashes, and EIP-55 checksum addresses. Keccak-256/512 and SHA3 in-browser.

Solidity Function Selector

Compute Solidity 4-byte function selectors (method ID) and 32-byte event topic hash via Keccak-256. Canonical signature normalization, calldata template, lookup.

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.