Security
Entropy Calculator
Estimate the entropy (bits) of a password or key.
Runs in your browser. Free — nothing sensitive leaves the page.
About this tool
Free entropy calculator tool. Estimate the entropy (bits) of a password or key. No signup, nothing uploaded.
Frequently asked questions
Is this safe to use?
Yes. Generation and hashing happen locally in your browser.
Do you store anything?
No. Nothing you enter is transmitted or stored.
Should I trust this for production?
Use it to generate or verify, but follow your own security policy.
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