Best Free Hash Generators Online 2026 — MD5, SHA-256, SHA-512

Need to hash a password, verify file integrity, or generate checksums? These tools do it instantly.

1. spunk.codes Hash Generator

Our free tool generates SHA-1, SHA-256, and SHA-512 hashes using the Web Crypto API — the same technology banks use. No data sent to servers.

When to Use Each Hash

• MD5: File checksums only (NOT for passwords — broken for crypto)
• SHA-1: Legacy systems (deprecated for security)
• SHA-256: Best general-purpose hash. Used by Bitcoin.
• SHA-512: Maximum security. Longer output.

Never Use for Passwords

Hashing passwords with MD5 or SHA is NOT secure. Use bcrypt, scrypt, or Argon2 for password storage. Use our password generator to create strong passwords.