Password Strength Checker – Check Password Online (Free Tool)
Free online Password Strength Checker tool to test password security. Analyze password strength and get recommendations for improvement. All checking happens locally.
Example Output
XKCD's favourite scapegoat — common substitutions don't dramatically help; length matters more.
Score: Good — length 11, mixed case, digit, symbol present
What is Password Strength Checker?
Password Strength Checker scores your password on length, character variety, and pattern detection without sending it anywhere. The strength label maps to "Weak → Strong" with explicit feedback on what to improve. Useful when teaching new users about passwords or pre-checking a candidate password before committing it to a vault.
Why use this tool?
- Touch-friendly UI, fine on phones for on-the-go edits
- No registration, account, or installation required
- No API keys to manage and no rate limits to monitor
- No upsell to a paid plan: every feature is free forever
- Designed for everyday quick tasks — open the page, get the answer, move on
How to use
- Type a password into the input — the strength score updates live
- Read the verdict (Weak / Fair / Good / Strong) and the underlying score breakdown
- Look at the recommendations below for what to add (length, mixed case, symbols)
- When you're done, pair with a password manager for storage
Examples
"password123" → Weak
Dictionary word + obvious trailing digits is the most common pattern guessers try first. Score reflects that.
"correcthorsebatterystaple" → Strong
Four random words pass the length threshold and are far harder to brute-force than short complex passwords.
"P@ssw0rd!" → Fair
Looks "complex" but the base word "password" is still recognised — common substitution doesn't earn many extra points.
Common use cases
- Teaching colleagues / students why length beats complexity
- Sanity-checking a candidate password before saving in a password manager
- Auditing service password policies during a security review
- Pairing with random-password-generator to verify generated output is genuinely strong
Troubleshooting
- My password tested "Strong" but a real check flags it.
- Length + variety screening can't spot every leaked password. Cross-check against a breach database (HaveIBeenPwned API) for the highest confidence.
- Password not stored — does that mean it's safe to paste here?
- The analysis runs entirely in your browser. Nothing is sent over the network. As a habit, only paste passwords you're still actively choosing, not ones already in use.
Frequently Asked Questions
It scores your password based on length, character variety (uppercase, lowercase, digits, symbols), entropy, and presence of common patterns. The result is a strength rating from Very Weak to Very Strong.
Try these related tools
Explore more Miscellaneous
Discover other free, privacy-first tools in Miscellaneous.