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Check Password Strength Before Signing Up

Test whether a password is strong enough before creating a new account on any website or app.

Nid oes angen mewngofnodi

Your password is never sent to any server.

Account Security tips

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A good password for a new account should be at least 12 characters and score "Strong" here. This means an estimated crack time in the billions of years.

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Use a passphrase β€” 4 random words like "coffee-river-lamp-moon" β€” it's easy to remember, has high entropy, and passes all strength checks.

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Avoid using personal info: names, birthdays, favourite teams. These are guessable through social engineering even if the password looks complex.

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Use a unique password for every account. A password manager generates and stores strong passwords for you so you only remember one master password.

Sut Mae'n Gweithio

1
Ewch i mewn
Enter your data into the tool above. Everything stays local to your browser.
2
Proses
The tool processes your data instantly in your browser using JavaScript. No server, no waiting.
3
Lawrlwythwch
Get your result instantly. Nothing is stored after you leave the page β€” complete privacy.

Pam defnyddio ein un ni?

βœ“Hollol rhad ac am ddim - dim costau cudd, byth
βœ“Nid oes angen cyfrif, e-bost na mewngofnodi
βœ“Nid yw ffeiliau byth yn gadael eich dyfais
βœ“Dim cyfyngiadau maint ffeil o gwbl
βœ“Dim dyfrnodau ar unrhyw allbwn

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