Công Cụ Kiểm Tra Độ Mạnh Mật Khẩu Miễn Phí

Mật khẩu của bạn có đủ mạnh không?

80% các vi phạm dữ liệu liên quan đến mật khẩu yếu hoặc bị đánh cắp. Nhập mật khẩu của bạn dưới đây để xem nó thực sự an toàn đến mức nào. Công cụ kiểm tra của chúng tôi phân tích độ dài, độ phức tạp và so sánh với các mật khẩu phổ biến đã biết — tất cả đều không rời khỏi trình duyệt của bạn.

How to read your result

The score reflects three things: length, unpredictability, and whether the password appears in lists of commonly breached passwords. A short password with symbols (like P@ss1!) scores worse than a long, plain passphrase, because attackers crack length last. If the checker flags your password, the fix is usually not “add another symbol”, it is “make it longer and less predictable”. Aim for something a stranger could not guess even if they knew you.

What actually makes a password strong in 2026

• Length beats complexity. Aim for at least 16 characters. A four-word passphrase is both stronger and easier to remember than a short scrambled string.
• Unique per account. Reuse is what turns one breach into ten. If a checked password is one you use elsewhere, change it everywhere.
• Let a manager do the work. Generate and store passwords in a password manager so you never have to memorise or reuse them. Create fresh ones with our secure password generator.

Everything runs in your browser, but as a habit, avoid pasting a password you actively use into any online field. Test a similar pattern instead. For the bigger picture, see how to tell if a software is real or fake and browse all our free security tools.

Câu hỏi thường gặp

Is it safe to type my password here?

The check runs in your browser and the password is not sent anywhere. Even so, the safest habit is to never type a password you actively use into any online tool. Test a similar length and pattern instead.

How long should my password be?

At least 16 characters. A longer passphrase of several unrelated words is stronger than a short string full of symbols, and far easier to remember.