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Free Password Strength Checker

Test how strong your password is. All analysis happens in your browser — nothing is sent to a server.

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Free Password Strength Checker

Type a password to see how long it would take to crack. The tool scores length, character variety, entropy and common patterns like dictionary words.

Checking happens entirely in your browser with a local algorithm — your password is never sent anywhere, so it's safe to test real passwords here.

Entropy and crack-time estimate

See bits of entropy and an estimated brute-force crack time, from instant to centuries, based on length and complexity.

Pattern detection

Flags dictionary words, keyboard walks (qwerty), repeated characters and common substitutions that weaken passwords.

Test real passwords safely

Because nothing leaves your device, you can check the actual passwords you use — then improve the weak ones with a password manager.

How to use

  1. Type or paste a password into the field.
  2. Watch the strength meter and score update live.
  3. Read the crack-time estimate and warnings.
  4. Strengthen weak spots: length beats complexity.

Frequently Asked Questions

Is it safe to type my real password here?

Yes. The check runs entirely in your browser with local JavaScript. Your password is never transmitted, stored or logged.

What makes a password strong?

Length matters most: 16+ random characters beat short complex ones. Mix cases, numbers and symbols, and avoid dictionary words and patterns.

How is crack time estimated?

From entropy: the tool estimates how many guesses an attacker needs and divides by typical cracking speeds. It's an estimate, not a guarantee.

Should I use a password manager?

Yes. A manager generates and stores unique random passwords for every site, so you only remember one master password.

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Frequently Asked Questions

No. All password analysis happens entirely in your browser using JavaScript. Nothing is sent to any server or stored anywhere. Your password never leaves your device.
A strong password is at least 12 characters long, includes uppercase and lowercase letters, numbers, and symbols, and is not a commonly used password or recognizable phrase.
Use unique passwords for every account and change them immediately if there is a security breach. With a password manager, you only need to remember one master password.
Yes. The password strength checker is 100% free with no limits, no signup, and no premium features. Use it as often as you like.
No account is required. Simply start typing to see your password strength score and improvement tips instantly.
No. Your password is never saved, logged, or transmitted. All analysis is performed locally in your browser session and discarded when you close the page.
Short passwords, common patterns like "123456" or "password", personal information, repeated characters, and lack of character variety all contribute to a weak password. The checker highlights each issue with actionable tips.

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