Shannon entropy calculator
Measure the entropy in bits of a text or password and its symbol frequency.
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Frequently asked questions
What does the result mean?
It's the average bits of information per symbol based on how often each one appears in the text. The maximum for n distinct symbols is log₂(n); efficiency compares against that.
Does it measure password strength?
Only roughly: it measures the symbol variety of that particular text, not how easy it is to guess.
Is Shannon entropy calculator free to use on Toolkoa?
Yes, the Shannon entropy calculator tool is 100% free, unlimited and requires no sign up or installation.
Are my files sent to any server when using Shannon entropy calculator?
No. Every operation on Toolkoa is processed privately and locally, directly in your own browser.
Do I need to install anything to use Shannon entropy calculator?
Nothing to install. Shannon entropy calculator runs in any modern desktop or mobile browser, and once the page has loaded you can keep using it without relying on the connection.