What hash algorithms are supported?

MD5, SHA-1, SHA-256, SHA-384, SHA-512 and HMAC variants (HMAC-SHA256, HMAC-SHA512). All algorithms run locally using the Web Crypto API and the browser's SubtleCrypto interface.

Is MD5 still safe to use?

MD5 is cryptographically broken and should not be used for security purposes such as password hashing or digital signatures. It is still useful for checksums, file integrity verification and non-security data fingerprinting.

What is HMAC and when would I use it?

HMAC (Hash-based Message Authentication Code) uses a secret key with a hash function to produce a message authentication code. It verifies both data integrity and authenticity. Common uses include API request signing and webhook verification.

Are my inputs uploaded to a server?

No. All hashing runs in your browser using the Web Crypto API (SubtleCrypto). Your input data is never transmitted to any server.

Can I hash a file rather than text?

Yes. Use the file input option to hash any file locally. The tool computes the hash directly from the file bytes without uploading anything.

HMAC Generator — SHA-256 & SHA-512

Keyed message authentication over MD5 and the SHA family. An HMAC proves a message came from someone holding the secret — a plain hash proves neither.