Construct secure HMACs (Hash-based Message Authentication Codes) straight from your browser. This tool helps developers and security professionals create cryptographic signatures to verify data integrity and authenticity. Supports standard hashing algorithms including MD5, SHA-1, SHA-256, and SHA-512. Simply enter your input string and secret key to generate the corresponding HMAC hash instantly. All processing is performed client-side using standard crypto libraries, ensuring your secret keys and data never leave your device.
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HMAC Generator
Generate Keyed-Hash Message Authentication Codes using standard algorithms.
HMAC Generator (MD5, SHA1, SHA256) Online
Generate Keyed-Hash Message Authentication Codes (HMAC) using MD5, SHA1, SHA256, and SHA512 algorithms securely in your browser.
1
Input Message
Enter the data you want to sign or verify.
2
Pick Hash
Select a cryptographic algorithm like SHA-256.
3
Apply Secret
Enter your secret key to compute the unique signature.
Key Features
Multiple Algorithms
Support for MD5, SHA-1, SHA-256, and SHA-512.
Client-Side Security
Your secret keys are never sent to any server.
Instant Generation
Real-time hash generation as you type.
Developer Ready
Perfect for debugging API signatures and verifying webhooks.
Frequently Asked Questions
Yes, absolutely. The HMAC calculation happens entirely in your browser using JavaScript. No data is ever transmitted to our servers.
We currently support HMAC-MD5, HMAC-SHA1, HMAC-SHA256, and HMAC-SHA512.
Yes, this tool is ideal for generating signatures to test API authentication headers.
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