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📊 Shannon Entropy Calculator

Calculate Shannon entropy with log₂/ln/log₁₀ bases, normalized entropy, randomness gauge, and per-character contribution breakdown

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Free online Shannon entropy calculator. Analyze text entropy in real time with three log bases (bits / nats / bans), normalized entropy (H/Hmax), visual randomness gauge, reference comparison bar, and per-character entropy contribution breakdown. Options for ignore case/spaces/newlines, preset examples, copy summary and JSON export. All processing runs locally in your browser.