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Password Strength Checker

Check how strong your password is, with a detailed breakdown of what makes it weak or strong.

Runs entirely in your browser — your files are never uploaded to a server.

Last updated

This check runs entirely in your browser — nothing you type is ever sent anywhere or stored

How It Works

1. Choose Your File

Drag & drop or select the file you want to work with.

2. Processed in Your Browser

Everything happens locally on your device — your file is never uploaded anywhere.

3. Download Your Result

Get your finished file instantly, ready to save or share.

About Password Strength Checker

Evaluates a password against specific, concrete factors — length, character variety, predictable patterns, resemblance to commonly-breached passwords — rather than giving a vague “weak” or “strong” label without explanation.

This is a genuinely different task from generating a password: this tool evaluates one you already have or are considering, flagging specific weaknesses so you know exactly what to improve rather than just that improvement is needed.

Runs entirely in your browser — your password is never transmitted anywhere, which matters specifically since typing a real password into a random web tool is otherwise exactly the kind of thing worth being cautious about.

Frequently Asked Questions

How strong is my password?

Type it into the box and the checker gives a score out of 100 with a label from Weak to Excellent, plus a checklist covering length, character types, common passwords, sequences like 1234 and repeated characters. It is a rule-based estimate, not a crack-time prediction.

Is my password strong enough?

Aim for the 12-character checkmark and a score in the Strong range or higher, with no sequences or repeats. Length matters most. Remember the score is a heuristic and only checks a small list of very common passwords, so a high score does not prove a password has never leaked.

Is my password secure?

The checker can tell you whether a password looks weak, but it cannot know if it has appeared in a data breach or whether you reuse it elsewhere. A secure password is long, random, unique to one account and ideally stored in a password manager.

Are password strength checkers safe?

This one runs in your browser and the page does not send what you type anywhere. In general, though, avoid typing a live password into any site you do not trust. If unsure, test a similar password with the same length and character mix instead of your real one.

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