Hash Lab
Calculate SHA-256, SHA-384 and SHA-512 digests or keyed HMAC values using the browser-native Web Crypto API.
HASH LAB / WEB CRYPTOREADY
TEXT INPUT
20 BYTESLIMIT / 5 MB
SHA-256 DIGEST
Output is lowercase hexadecimal. Processing uses the browser's Web Crypto API and does not upload the input or key.
ENGINE / NATIVEWeb Crypto
Digest and HMAC operations use SubtleCrypto rather than a custom cryptographic implementation.
ALGORITHMS / SHA-2256 · 384 · 512
The public tool focuses on modern SHA-2 algorithms and does not promote legacy MD5 or SHA-1.
LOCAL / 5 MBText or file
Inputs and HMAC keys remain in the browser. Files are capped for predictable performance.