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Entropy Calculator

Analyze data randomness and entropy using Shannon entropy calculation. Measure data complexity and assess cryptographic strength of your data.

Data Input
Enter text or upload a file to analyze its entropy
About Entropy Analysis

What is Entropy?

Entropy measures the randomness or unpredictability of data. In cryptography, higher entropy means more secure data. Shannon entropy quantifies the average information content in a message.

Entropy Levels

  • • Very High (90%+): Excellent randomness, suitable for cryptography
  • • High (70-90%): Good randomness, generally secure
  • • Medium (50-70%): Moderate randomness, may need improvement
  • • Low (30-50%): Poor randomness, not suitable for security
  • • Very Low (<30%): Very predictable, avoid for security

Applications

  • • Password strength assessment
  • • Random number generator evaluation
  • • Cryptographic key analysis
  • • Data compression efficiency
  • • Information theory research