Sicherheit · Lokaler Datenschutz
Passwort-Sicherheitsprüfung online
Länge, Vielfalt und vorhersehbare Muster prüfen, ohne das Passwort an den Server zu senden.
Password Strength Checker
Ihr Passwort wird lokal im Browser analysiert und nicht an den Server gesendet.
Orientierende Kriterien
Empfehlungen
Quick guide
How do I know if a password is strong?
Strength depends on length, unpredictability, lack of patterns and uniqueness. This tool provides a heuristic estimate, not a security certification.
Length versus complexity
A long password is usually preferable to a short one with predictable substitutions such as a for @ or o for 0. Thresholds are guidance, not universal rules.
What is a passphrase?
A long, unpredictable passphrase can be resilient without using every character type. Internal spaces are allowed and are not removed.
Common patterns
123456, qwerty, password123 and admin123 frequently appear in automated attacks. The tool checks a limited local list.
Unique passwords and managers
Use a different password for every service. A password manager can help generate and store long passwords without reusing them.
Frequently asked questions
Fragen zur Passwortsicherheit
How do I know if my password is secure?
Check its length, unpredictability, lack of patterns and uniqueness. No local score is an absolute guarantee.
How many characters should a password have?
As guidance, 12 or more characters is preferable; long passphrases can be even better.
Do symbols matter?
They can add variety, but length and unpredictability usually matter more than a fixed recipe.
Is a longer password better?
Generally, yes. A long, unpredictable password usually resists attacks better than a short one with superficial changes.
What is a passphrase?
It is a password made from multiple words that is long and difficult to predict.
Does the tool store my password?
No. It is analyzed in memory and is not stored in cookies, browser storage or the server.
Is my password sent to the server?
No. The analysis happens entirely in JavaScript in your browser.
Does a high score guarantee safety?
No. It is a heuristic estimate and cannot know previous exposure, reuse or every attacker strategy.
Should I reuse the same password?
No. Use a unique password for each service to limit the impact of a breach.
Should I use a password manager?
Yes. It can help you generate, store and use long, unique passwords.
