Password Strengthener
Harden your existing password so it grows longer and more robust while staying recognizable and more resistant to attacks. Runs in your browser, GDPR-compliant.
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How to use this tool (video)
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Password Strengthener – Make Your Password Strong
The Password Strengthener turns your existing password into a longer, more robust version without starting from scratch. Instead of generating a completely new random password, it keeps the base of your password and enriches it with additional characters. The result stays recognizable but becomes much stronger. Everything runs in your browser; your password never leaves your machine.
How password hardening works
The strengthener analyzes your password and produces several hardened variants. The key improvement is length: a longer password is exponentially harder to crack. It also adds a mix of uppercase letters, digits, and symbols. Before and after each variant you see a score from 0 to 4, so you can see the difference at a glance.
Why harden an existing password instead of generating a new one?
- The base stays intact, so you recognize your password
- You don't have to get used to a completely random string
- It is a useful step before continuing with a password manager or a mnemonic generator
The connected workflow
The strengthener is part of the security workflow: first check your current password with the password checker, then harden that exact password with the strengthener, and finally make it easy to remember with the password mnemonic. Each step carries the previous one forward.
Frequently asked questions
What happens to my password?
It is processed only in your browser. The strengthener is a pure client-side tool and does not transmit your password anywhere.
Why does the base of my password stay intact?
So you can recognize and remember the hardened password. The strengthener lengthens your password and enriches it with uppercase letters, digits, and symbols, instead of replacing it with an unrelated random string.
How strong is the best variant?
The hardened variants meet common recommendations: at least 16 characters combining uppercase, lowercase, digits, and symbols. The score shows the difference before and after on a scale from 0 to 4.
Can I use the strengthener to create a new password?
For a fully random password the password generator is the right tool. The strengthener is designed to improve your existing password while keeping it recognizable.