Hash Calculator
Regular Hash:
HMAC:
Tip: HMAC uses a key to sign messages; the same key + same text is required to get the same result.
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1
Input Character Count
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Input Byte Count (UTF-8)
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Algorithms Calculated
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Calculation Time
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Tool Description
This tool is an online Hash calculator supporting MD5, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512 and other mainstream hash algorithms, as well as HMAC-MD5/SHA1/SHA256/SHA384/SHA512 message authentication code algorithms. All calculations are performed locally in your browser.
What is HMAC?
HMAC (Hash-based Message Authentication Code) is a technique that uses a key to authenticate messages. It verifies not only message integrity but also message origin. Formula: HMAC(K, m) = H((K ⊕ opad) || H((K ⊕ ipad) || m)). Widely used in API signing, JWT signing, payment callback verification, and other scenarios.
Tool Features
- 11 algorithms available: Supports MD5, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512, and HMAC-MD5/SHA1/SHA256/SHA384/SHA512.
- SHA-224 and HMAC-MD5 are implemented in native JS, with no dependency on browser Web Crypto API support.
- HMAC key input: The key input box automatically appears when selecting HMAC algorithms, convenient for API signature debugging.
- Real-time calculation: Automatically calculates hash values as you type (can be disabled).
- Quick copy: Provides individual copy buttons for each algorithm's result.
- Pure front-end implementation: All algorithms run locally in the browser, no data uploaded.