HMAC Online Encryptor

Hash-based Message Authentication Code calculator supporting MD5, SHA1, SHA256 and more

Input Message

Secret Key

Key used to sign and verify the message

Hash Algorithm

Output Format

Documentation

This tool generates HMAC message authentication codes with multiple hash algorithms and key formats, useful for signature and integrity workflows.

Key Features

Supports HMAC-SHA family algorithms
Key formats: text, hex, and Base64
Output formats: hex and Base64
One-click copy for generated result

Steps

Enter the message to sign.
Input secret key and choose key format.
Select algorithm and output format.
Generate and copy the HMAC value.

Use Cases

API request signature verification
Webhook signature validation
Data integrity checks

Notes

HMAC security depends on strong secret keys.
Both sides must use identical algorithm, encoding, and key.
HMAC is for authentication, not encryption.