Password Checker — free, private, in your browser
Check how strong a password is and generate secure ones — entirely in your browser. Your password is never sent anywhere; all analysis happens locally on your device. Free, no signup.
- Strength analysis + generator
- Nothing sent — fully private
- Free, no signup
- Runs offline
🔐 Password Tool
Generate strong passwords or check how safe yours is. Everything runs in your browser — nothing is sent anywhere.
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Uppercase (A–Z)
Lowercase (a–z)
Numbers (0–9)
Symbols (!@#...)
Exclude look-alikes (0/O, 1/l/I)
Memorable (word passphrase)
Strength—
Length
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Entropy (bits)
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Estimated time to crack
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Strength—
Length
0
Entropy (bits)
0
Estimated time to crack
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Type a password above to see tips.
🔒 Your password stays in your browser — never sent to any server or stored anywhere.
How to use Password Checker
- Open the toolOpen the Password Checker tool using the launch button above.
- Type a passwordType or paste the password you want to test — it stays in your browser and is never sent anywhere.
- Read the scoreThe strength score, estimated crack time and list of weaknesses are calculated locally on your device.
- Strengthen itUse the built-in generator or tweak your password and retest until it scores strong. Nothing was sent to a server.
Frequently asked questions
Are my files uploaded anywhere?
No. Password Checker runs entirely in your browser — your files never leave your device and are never sent to a server.
Do I need to sign up?
No. There's no account and no signup — open the tool and use it.
Is it really free?
Yes — free to use, with no watermark.