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HMAC Calculator

Easily generate HMAC digests using our free online tool, perfect for developers and security professionals ensuring data integrity and authenticity.

HMAC Calculator IconA modern, flat-design SVG icon representing an HMAC calculator with a message and key.

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About This Tool

Our HMAC Calculator is a versatile, easy-to-use online tool designed to generate Hash-based Message Authentication Codes (HMAC) quickly and securely.
Using supported algorithms like MD5, SHA-1, SHA-256, and SHA-512, users input their message and secret key to produce a digest in real-time.
This tool is essential for developers, cybersecurity specialists, and anyone handling secure data transmission, API validation, or digital signatures.
It offers customizable output encoding options, such as Hex and Base64, making it flexible for various workflows.
Built with a modern design, the calculator ensures accessibility, responsiveness, and simplicity — making secure message verification straightforward and fast.

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How to Use

1. Enter your message in the 'Message' field.
2. Provide your Secret Key in the corresponding input.
3. Select the preferred hash algorithm and output encoding.
4. Observe the generated HMAC digest update instantly.
5. Copy the result or reset inputs for a new calculation.

FAQs/Additional Resources

Find Quick Answers

What is an HMAC and why is it important?

Which algorithms can I use with this tool?

Can I verify existing HMACs?

Is this calculation secure?

User Reviews

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John Doe

John Doe

CEO of Company

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.

John Doe

John Doe

CEO of Company

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.

John Doe

John Doe

CEO of Company

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.

John Doe

John Doe

CEO of Company

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.

John Doe

John Doe

CEO of Company

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.

John Doe

John Doe

CEO of Company

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.

John Doe

John Doe

CEO of Company

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.

John Doe

John Doe

CEO of Company

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.

John Doe

John Doe

CEO of Company

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.

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