Hash Generator

This free online hash generator creates cryptographic hashes using industry-standard algorithms: SHA-1, SHA-256, and SHA-512. Generate hashes from text input or file uploads, and create HMAC signatures for message authentication. All hashing happens entirely in your browser using the Web Crypto API - no server uploads, completely private and secure.

SHA-1 (160 bits): While deprecated for security purposes due to collision vulnerabilities, SHA-1 is still used in legacy systems and Git (where collision resistance is sufficient for practical use).

SHA-256 (256 bits): Part of the SHA-2 family, widely used in modern applications including blockchain technology, SSL/TLS certificates, password hashing, and digital signatures. Considered secure for most applications.

SHA-512 (512 bits): The most secure option with longer hash output, ideal for high-security applications and large data integrity verification where extra collision resistance is desired.

HMAC: Hash-based Message Authentication Code combines a cryptographic hash function with a secret key to verify both data integrity and authenticity. Perfect for API signatures, webhook verification, and secure message authentication.

Perfect for developers verifying file integrity, creating API signatures, testing webhook authentication, or learning about cryptographic hash functions. Use the text hash for quick string hashing, file hash for verifying downloads or uploads, and HMAC for implementing secure authentication mechanisms.