Text Entropy Calculator
Quick Tips
- • This tool runs entirely in your browser - your data stays private.
- • Press Ctrl+V (Cmd+V on Mac) to quickly paste text.
- • Use the Copy button to save your result to clipboard.
- • Bookmark this page for quick access!
Calculate the entropy (randomness) of text.
Words
Characters
No Spaces
Sentences
Paragraphs
Lines
Reading Time (200 wpm)
Speaking Time (150 wpm)
Your Recent Tools
Examples
aaaaaaa
Entropy: 0 bits (no randomness)
aB3$xY9!
Entropy: 3+ bits (random)
Why Use This Tool?
What problems does this solve?
Text entropy measures randomness and information density, useful for password strength analysis, compression potential, and detecting patterns.
Common use cases:
- Evaluating password strength based on entropy
- Analyzing text complexity and information density
- Detecting patterns in seemingly random text
Who benefits from this tool?
Security professionals evaluating password strength. Researchers analyzing text complexity. Cryptographers studying information theory. Developers optimizing compression.
Privacy first: All processing happens in your browser. Your sensitive text and passwords never leave your device.
Frequently Asked Questions
A measure of randomness or unpredictability. Higher entropy = more random/complex.
Natural text: 3-4 bits/char. Random: ~5 bits/char. Compressed: lower.
For password strength analysis, compression optimization, and cryptography.
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