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SHA hash and HMAC generatorEN

Create a deterministic digest or a keyed message authentication code and choose hex or Base64 output.

Options

SHA digests are not password hashes. HMAC needs a shared secret.

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How to use it

Use a digest to compare bytes and HMAC when two parties already share a secret authentication key.

  1. Choose Digest or HMAC, then select SHA-256, SHA-384, or SHA-512.
  2. Enter the message and, for HMAC only, a non-empty secret key.
  3. Generate the result and copy the exact hexadecimal or Base64 value.

Worked example

Input
SHA-256 message: abc
Output
ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad

The example is the standard SHA-256 digest of the UTF-8 bytes for “abc”.

Method and definitions

  • The Web Crypto API processes UTF-8 message and key bytes using the selected secure-hash family member.
  • HMAC mixes a secret key into the hash construction; a plain digest has no secret.

Limits and edge cases

  • A fast SHA digest is not suitable for storing passwords and HMAC is not a digital signature.
  • A digest verifies integrity only when the expected value comes through a trusted channel.

Privacy

All input and output stays in this tab. Rigula does not upload, store, or include it in a share URL.