Calculate Text Entropy

Measure how much information is in your text with the Calculate Text Entropy Tool. This browser-based utility computes Shannon entropy, showing how random or predictable your characters are. It’s great for analyzing strings, comparing inputs, or exploring data compression potential.

Paste your input above or import a file below.
No file chosen
Supported file types: .txt, .csv, .tsv, .log, .json, .xml, .md, .ini, .yaml, .yml, .html, .htm, .css
Options
Ignore case
Include whitespace
Total text entropy
Maximize output

How to Use:

Paste or type your content into the input box on the left. You can also load a file using the Choose File button. As soon as you enter or import text, the entropy values appear in the output box on the right.

In the Options panel, choose whether to ignore case, include whitespace, or calculate a single total entropy value instead of line-by-line results. The tool updates live whenever you change input or settings. Once you’re done, you can copy or export the output, or reset everything with Clear All.

What the Calculate Text Entropy Tool Does:

The Calculate Text Entropy Tool computes the Shannon entropy of each line or the entire input. It works by calculating the probability distribution of characters, then applying the standard entropy formula. Lower values indicate more repetition and predictability, while higher values reflect more randomness and variety. Everything happens locally in your browser with no data sent anywhere.

Example:

Input:

hello
entropy test
aaaaaa

Options:

  • Ignore case: on
  • Include whitespace: off
  • Total text entropy: off

Output:

2.32193
3.16993
0.00000

Common Use Cases:

The Calculate Text Entropy Tool is useful for linguists, data scientists, cryptographers, and educators. Whether you’re checking password strength, comparing randomness in outputs, or analyzing text for compressibility, this tool gives fast, clear insight. It’s perfect for spotting patterns and understanding complexity without leaving your browser.

Useful Tools & Suggestions:

If you’re analyzing complexity, Calculate Text Complexity gives you a more human-readable score alongside the entropy value great for evaluating readability. And when you want to prep or refine your input, Normalize Text Spacing helps remove irregularities that can skew entropy results.

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