What is this Tool?
The Password Strength Checker analyses your password's strength in real time and estimates how long it would take a modern computer to crack it using brute force. All analysis happens entirely in your browser — your password is never sent to any server or stored anywhere. This tool helps you understand what makes passwords weak or strong and gives specific actionable tips to improve your security.
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Small pocket-size (4.5 × 5.9 in) logbook for website logins, organised A–Z.
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Frequently Asked Questions
How do I check if my password is strong?
Type a password into the checker above. It scores it out of 100 against 8 rules — length (8, 12 and 16+ characters), uppercase, lowercase, numbers, symbols and common patterns — and shows an estimated crack time. Strong passwords score 75+; very strong ones 90+.
What is a password strength checker?
It's a tool that analyses a password's length, character variety and patterns, and rates it from weak to very strong. This one runs entirely in your browser, so nothing you type is sent or stored.
How secure is my password?
Security depends mainly on length and randomness. An 8-character password using only lowercase letters has about 209 billion combinations — a fraction of a second for fast cracking hardware. A random 16-character password using all character types has so many combinations that brute force would take far longer than a lifetime.
How safe is my password?
A password is only as safe as its weakest use. Even a strong password becomes unsafe if you reuse it: when one site is breached, attackers try the same email and password on other sites. Use a different password for every account.
How hackable is my password?
Attackers rarely guess character by character. They start with leaked-password lists, dictionary words, names, dates and common substitutions like @ for a or 0 for o. Passwords built from those patterns fall quickly even if they look complex. Long, random passwords are the hardest to crack.
How does the crack time estimate work?
The tool counts the possible combinations for your password's length and character types, then divides by one trillion guesses per second — a rough benchmark for offline attacks with powerful hardware. Treat it as a comparison between passwords, not a guarantee: patterns and reused passwords can be cracked much faster.
What makes a password strong?
Length first — 16 or more characters if you can — then randomness. Mix uppercase, lowercase, numbers and symbols, and avoid dictionary words, names, birthdays, keyboard patterns like qwerty, and anything you've used before.
How do I make a strong password?
The easiest reliable way is to let a password manager generate a random one. If you need something memorable, use a passphrase of five or more random, unrelated words with a few numbers or symbols added — words picked at random, not a quote or song lyric.
Can I use a strong password example from the internet?
No. Any password that has been published — including famous examples like "correct horse battery staple" or "Tr0ub4dor&3" — is already in the word lists attackers use. Always create your own, and never reuse one you've seen online.
What is a passphrase?
A passphrase is a password made of several random words, for example four or five unrelated words joined with symbols. Because it's long, it can be both easier to remember and harder to crack than a short complex password — as long as the words are chosen randomly.
Should I use a password manager?
Yes. A password manager creates and stores a unique, strong password for every site, so you only need to remember one master password. Well-known options include Bitwarden (which has a free plan), 1Password and Dashlane.
Should I turn on two-factor authentication?
Yes, wherever it's offered — especially for email, banking and social media. With two-factor authentication, a stolen password alone isn't enough to get into your account.
What should I do if my password was in a data breach?
Change it immediately on that site and on every other site where you used the same password, and turn on two-factor authentication. You can check whether your email appears in known breaches at haveibeenpwned.com.
Is it safe to type my password in this tool?
The checker runs entirely in your browser and never sends what you type anywhere. Even so, it's good practice to test a similar pattern rather than a password you actively use.
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⚠️ Affiliate disclosure: We may earn a small commission if you purchase through these links at no extra cost to you. Learn more
📓 Small Pocket Password Book with Tabs
4.5×5.9 inch pocket-sized password book with alphabetical tabs — discreet, lightweight and perfect for travel.
📔 Hardcover Address & Password Book
5.3×7.7 inch hardcover keeper with A–Z tabs — stores passwords, addresses and contacts in one organised book.