What is the HMAC Generator?
Generate an HMAC signature with a secret key. The HMAC Generator is a free online tool that works instantly in your browser — no installation, no signup and nothing to upload. It sits alongside other Cryptography tools on DevNibble such as Hash Generator, MD5 Hash Generator, CRC32 Checksum.
How to use the HMAC Generator
- Choose the options you want.
- Click Generate to create your output.
- Copy or download the results.
Features
- Runs 100% in your browser — your data is never uploaded or stored.
- Free forever, with no account, no ads and no tracking.
- Copy or download your result in one click.
- Fast and responsive on desktop, tablet and mobile.
Frequently asked questions
Is the HMAC Generator free to use?
Yes — HMAC Generator is completely free with no sign-up, no ads and no limit on how many times you can use it.
Is my data private when I use the HMAC Generator?
Everything happens locally in your browser. Your input is never sent to a server, which makes HMAC Generator safe to use with private or sensitive data.
How do I use the HMAC Generator?
Enter your text and key/options, and HMAC Generator performs the operation locally without ever sending anything to a server.
Is HMAC Generator secure to use?
HMAC Generator follows the standard algorithm and runs locally, so your keys and data never leave your browser. Always keep your secret keys private.