HMAC Generator
Generate HMAC signatures using SHA-256 and SHA-512 algorithms. Perfect for API authentication, webhook validation, and ensuring data integrity with a secret key.
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Secure & Private Client-Side
This tool runs entirely in your browser. No data is sent to any server, ensuring your information remains private and secure.
About HMAC Generator
Generate HMAC signatures using SHA-256 and SHA-512 algorithms. Perfect for API authentication, webhook validation, and ensuring data integrity with a secret key.
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Frequently Asked Questions
What is HMAC? expand_more
HMAC (Hash-based Message Authentication Code) combines a cryptographic hash function with a secret key to verify data integrity and authenticity.
How secure is HMAC? expand_more
HMAC with SHA-256 or SHA-512 provides strong cryptographic security. The secret key should be kept confidential and should never be shared.
When should I use HMAC? expand_more
Use HMAC for API authentication, webhook signature verification, JWT tokens, and ensuring data hasn't been tampered with in transit.
What's the difference between SHA-256 and SHA-512? expand_more
SHA-256 produces 32-byte hashes, SHA-512 produces 64-byte hashes. SHA-512 provides stronger security but uses more storage and bandwidth.
Can I verify HMAC signatures? expand_more
To verify, generate HMAC with the same message and secret key, then compare with the received signature. Matching HMACs confirm authenticity.
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