Password Strength Checker
Estimate password strength from length and character variety. The score updates as you type.
Password
Strength
Results update as you type.
Private by design
This conversion runs entirely in your browser. Your text is not sent to a server.
Tip
This is a quick local estimate, not a breach check. Prefer a password manager and unique passwords per site.
How to check with Password Strength Checker
Type or paste the password you want to score.
The strength label and tips update as you type — nothing is uploaded.
Length and mixed character sets raise the score. Follow the tips to improve it.
Generate a stronger password next door if this one is weak.
When should you use it?
Length
Aim for 12 or more characters. Eight is a minimum, not a goal.
Mix
Combine upper and lower case, numbers, and symbols.
Accounts
Check a candidate before you save it in a password manager.
Stays here
The password never leaves this tab.
Your password stays private.
Strength scoring runs entirely in this browser. The password is not saved or uploaded.
About checking password strength in this tab
Password Strength is a local estimate of how mixed a password looks: length plus whether you used uppercase, lowercase, digits, and symbols. The label updates as you type. Nothing is uploaded, and we do not persist the field — that is the point. A “strong” score is not a breach check, not Have I Been Pwned, and not a guarantee an attacker cannot guess a common phrase. Use unique passwords and a password manager. Generate a new one on Password Generator if this checker stays weak.
We do not measure entropy against a dictionary of leaked passwords. Repeating “Password1!” still looks mixed to a character-class heuristic. Spaces and emoji are not a substitute for length. Do not paste production secrets on a shared computer. Close the tab to drop the string from memory.
Related: Password Generator to create a random string instead of scoring one you invented. Bcrypt Hash if you need a $2 hash to store, not a strength label. Hash Generator is for SHA checksums of files, not for storing passwords. UUID Generator if you needed an identifier rather than a secret.
Related password tools
Password Generator
Generate strong random passwords instantly in your browser. Free, private, and no signup required.
Bcrypt Hash / Verify
Hash a password with bcrypt, or verify a password against an existing hash — locally in your browser.
Hash Generator
Generate SHA-1, SHA-256, SHA-384, or SHA-512 hashes using various encodings. Hashing is commonly used to verify integrity and fingerprint data.
UUID Generator
Generate UUIDs instantly in your browser. Free, private, and no signup required.
Password Strength Checker examples
Too short
Mixed and long
Password Strength Checker FAQ
It looks at length and whether you mixed uppercase, lowercase, numbers, and symbols. The label updates as you type. Nothing is uploaded and the field is not persisted.
It is a local estimate, not a breach check. Repeating a common phrase can still look mixed. Use unique passwords and a password manager. Generate a new one if this checker stays weak.
Not on a shared computer. Close the tab to drop the string. Password Generator creates a random secret instead of scoring one you invented.