Why check password strength at all
A password that feels secure ("Summer2024!") can still be guessed in seconds, because attackers don't type guesses by hand — they run software that tries billions of common patterns per second. The only way to know if yours holds up is to measure it: how many truly unpredictable characters it has, and roughly how long it would take a machine to crack it.
This guide shows you how to do exactly that with the password strength checker. You'd want this before reusing a password on an important account (email, bank, work login), when setting up a new account, or when you're cleaning out a password manager and want to flag the weak ones. The tool runs entirely in your browser — what you type is analyzed on your own device, never sent to a server, and there's no sign-up. That matters a lot here: you should never paste a real password into a site that transmits it.
How to check how strong your password is
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Open the password strength checker. It loads as a single page with an input box and a results panel — nothing to install.
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Type or paste your password into the input field. Analysis happens live as you type, so you'll see the meter react with every character. Use the eye icon to reveal or hide the text if someone might be looking over your shoulder.
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Read the strength label and score first. The tool gives you a 0–100 score and a plain-English rating: Very Weak, Weak, Fair, Strong, or Very Strong. Anything below "Strong" is worth improving for an account that matters.
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Look at the estimated crack time. This is the headline number — it tells you roughly how long an attacker's hardware would need to guess your password by brute force. "Instant" or "a few seconds" means stop using it now. "Centuries+" means you're in good shape.
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Check the entropy value. Entropy (measured in bits) is the real math behind strength — it counts how unpredictable the password is based on its length and character variety. Higher is better; aim for a password where entropy keeps the crack time in years, not days.
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Scan the warnings. The checker flags common passwords (like "password123"), keyboard runs (qwerty, asdf), sequential numbers, repeated characters, dates, and dictionary words. Each flag is a shortcut an attacker would try first, so every one you remove makes a real difference.
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Apply the suggestions and re-type. The tool lists specific fixes — add length, mix in symbols, drop the predictable word. Edit your password in place and watch the score climb until the rating reaches Strong or Very Strong.
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If your password is weak, switch to the built-in generator (the tool has a generator tab) or open the dedicated password generator to produce a random one, then paste it back in to confirm it scores Very Strong before you save it.
Tips
- Length beats complexity. A long passphrase of ordinary words ("river-copper-lantern-92") usually scores higher than a short string of symbols, because length raises entropy fastest. Watch the meter and you'll see this for yourself.
- Avoid anything in the warning list. Names, birth years, "2024", and "!" tacked on the end are the first things cracking tools try. The checker will call these out specifically.
- Don't reuse strong passwords either. A password can be Very Strong and still be useless if it leaked from one site and you used it everywhere. Use a unique one per important account and store them in a password manager.
- Test before you commit. Generate, paste into the checker, confirm the rating, then save. It takes ten seconds and beats discovering the weakness later.
- For the bigger picture on hashing, breaches, and password managers, the password security guide goes deeper than this how-to.
Common problems
- "My password scores Weak but it has symbols." Symbols alone don't help much if the base is a common word or it's short. Add length and remove the dictionary word — the score responds immediately.
- "The crack time looks too optimistic." Estimates assume offline brute-force at a typical attack speed. They're a guide, not a guarantee. Treat anything under "years" as a reason to strengthen it.
- "I'm nervous typing my real password in." That's the right instinct for most sites. This tool is safe because the analysis runs locally in your browser with no upload — but if you'd rather not, generate a fresh random password and test that instead.
FAQ
Is it safe to type my real password into this checker? Yes. The password strength checker does all the analysis in your browser using local code — your password is never transmitted, stored, or logged. Nothing leaves your device, and there's no account to create.
What's a good target score or crack time? Aim for a "Strong" or "Very Strong" rating, with an estimated crack time measured in years or longer. For high-value accounts (email, banking), don't settle for less — and pair it with two-factor authentication where you can.
What does entropy actually mean? Entropy in bits measures how many guesses, on average, an attacker would need. Each extra bit roughly doubles that effort. A password under ~40 bits is weak; pushing well past 60 bits is where you want to be, and length is the easiest way to get there.
How is this different from a hash generator? A strength checker rates how guessable a password is. A hash tool transforms it for storage. If you're a developer storing passwords, use the bcrypt generator to hash them and the hash verifier to confirm a value matches.
Need a new password to test? Spin one up with the password generator, then paste it back into the strength checker to confirm it lands at Very Strong.