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SHA-256 Calculator

Calculate SHA-256 hash digest of hex string input — 256-bit output as 64-character hex

🔐 Input

Enter hex bytes (e.g. 48656C6C6F for "Hello"). Spaces are allowed. Leave empty and check "Hash empty message" to hash zero-length input.

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📖 About This Tool

What is the SHA-256 Calculator?

The SHA-256 Calculator computes SHA-256 hash digests from hexadecimal input. SHA-256 produces a 256-bit (64 hex character) hash value used in digital signatures, certificate verification, and blockchain applications.

🛠️ How to Use
  1. Enter your hexadecimal data.
  2. Click Calculate to compute the SHA-256 hash.
  3. Copy the 64-character hex digest.
❓ FAQ

What is SHA-256 used for in payments?

SHA-256 is used for HMAC-based message authentication, digital certificate verification, tokenization, and as the basis for many payment security protocols including EMV and 3D Secure.