How secure are the generated passwords?

Our password generator creates cryptographically random passwords using the browser's built-in Crypto API. You can customize length, character sets, and complexity to meet your security requirements.

Does this tool store my passwords or encrypted data?

No. All encryption, hashing, and password generation happens client-side. Your data never reaches any server and is not stored or logged.

What hash algorithms are supported?

We support MD5, SHA-1, SHA-256, SHA-384, SHA-512, bcrypt, HMAC, and more. All hashing is performed in your browser.

Can I use two-factor authentication?

Our 2FA tool generates Time-based One-Time Passwords (TOTP) compatible with Google Authenticator, Authy, and other authenticator apps.

Entropy Calculator

Free online entropy calculator. Calculate password/text entropy in bits. Your data stays on your device.

Enter text above to calculate entropy

Embed this tool

Copy and paste the code below into your website to embed this tool for free. An attribution link to The Util Box is required.

<iframe src="https://www.theutilbox.org/embed/entropy-calculator" width="600" height="500" frameborder="0" style="border: none; max-width: 100%;" title="Free Entropy Calculator tool from The Util Box"></iframe>
<!-- Free tool by The Util Box — https://www.theutilbox.org/tools/entropy-calculator -->
<a href="https://www.theutilbox.org/tools/entropy-calculator">Entropy Calculator by The Util Box</a>

Frequently Asked Questions about Entropy Calculator

What Is Entropy Calculator?

Free online entropy calculator. Calculate password/text entropy in bits. Your data stays on your device. Whether you need a quick calculation, text transformation, or data conversion, this free online security encryption tool delivers instant results entirely in your browser — no server uploads, no sign-ups, and no data leaves your device.

How to Use the Free Entropy Calculator Online

Enter your input — type, paste, or select data in the provided field.
Adjust options — tweak any available settings or parameters to match your needs.
Get instant results — output appears immediately as you type or after clicking a button.
Copy or export — use the copy button to grab the result for use elsewhere.

All processing happens client-side using JavaScript, so your information never leaves your computer. This free online security encryption tool requires no registration and works on any modern browser.

Why Choose Our Free Entropy Calculator Tool?

100% free — no hidden premium tiers or usage limits.
Fully private — runs entirely in your browser; no data is sent to any server.
Instant & fast — results appear in milliseconds with zero load times.
Works offline — after the first load, the tool is available without an internet connection.
No sign-up — open the page and start using it immediately.

Entropy Calculator — Quick Reference

Feature	Details
Category	security encryption
Processing	100% client-side (browser)
Privacy	No data leaves your device
Cost	Free — no sign-up required
Works Offline	Yes (after first load)