SM3 Encryption Tool
SM3 message digest algorithm.
Input
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Result
Result
Lowercase
Uppercase
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LOCAL All operations are performed locally in the browser and no data will be uploaded.

What is SM3?

SM3 is a cryptographic hash function published by China's State Cryptography Administration, compressing messages into a 256-bit digest with security comparable to SHA-256.

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Core Value

  • High collision resistance
  • Excellent one-way property
  • Significant avalanche effect
  • National standard replacement
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Technical Specs

  • 256-bit output
  • 512-bit block size
  • 64 rounds iteration
  • Hexadecimal display
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Scenarios

  • Integrity verification
  • Digital signature help
  • Secure password storage
  • Random number generation
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Technical Features

  • Rigorous design
  • Strong resistance
  • Hardware/Software friendly
  • Finance & Gov preferred

🚀 How to Use

  • Hashing: Enter text in the box, and the tool will automatically calculate the SM3 digest.
  • Results: Both upper and lower case formats are provided for easy one-click copying.
  • Security: All calculations are local; your original data is never uploaded.

💡 FAQ

Can SM3 be decrypted?
No. SM3 is a one-way hash algorithm and is irreversible. Original data cannot be restored from the digest.
SM3 vs MD5?
SM3 is 256-bit and much more secure. MD5 is only 128-bit and vulnerable to collisions, no longer recommended for security.

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