HMAC Generator
Compute HMAC signatures (SHA-256/512/384/1) of any message with a secret key for API signing and webhook verification.
HMAC proves a message was produced by someone holding the shared key (API signing, webhook verification). MD5 is omitted — WebCrypto does not expose it, and it is no longer safe for signatures.
About HMAC Generator
Compute HMAC signatures (SHA-256/512/384/1) of any message with a secret key for API signing and webhook verification.
HMAC Generator does the security work in your browser using well-known algorithms, so sensitive input never has to be sent to a remote server.
How to Use HMAC Generator
- Enter the secret text, file or value you want to process.
- Choose the algorithm, key or options required.
- Run the operation — the output appears instantly and locally.
- Copy the result safely.
Key Features
- Encryption and hashing run locally — your secrets stay on your device.
- Uses established, well-documented algorithms and standards.
- No account, no key storage, no data retention.
Frequently Asked Questions
Is HMAC Generator safe to use with sensitive data?
Yes. HMAC Generator runs entirely inside your browser using in-page cryptography, so your inputs are never uploaded, logged or shared.
Is HMAC Generator free to use?
Yes. HMAC Generator is completely free with unlimited use — no account, download or payment required.
Is my data uploaded to a server?
No. HMAC Generator runs entirely in your browser. Your inputs are never sent to our servers or stored anywhere.
Does HMAC Generator work on mobile?
Yes. The interface is fully responsive and works in any modern browser on Android, iPhone, tablets and desktops.