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"Password Security: How to Check If Your Password Has Been Leaked"

Learn how to check if your passwords have been exposed in data breaches. Free tools to generate strong passwords and test your security.

OneKitTools TeamMarch 28, 2026

Are Your Passwords Safe?

Over 10 billion passwords have been leaked in data breaches. That's more than one for every person on Earth. Chances are, at least one of your passwords is floating around on the dark web right now.

The good news? You can check — and fix it — in seconds.

How to Check for Breaches

Email Breach Check

Our Email Breach Checker queries the HaveIBeenPwned database to see if your email appears in any known data breach:

  1. Enter your email address
  2. We check against 700+ known breaches
  3. See which services were compromised and when

Your email is never stored — the check happens in real-time using a secure API.

What to Do If You're Breached

  1. Change the password immediately on the affected service
  2. Change it everywhere else if you reused that password
  3. Enable 2-factor authentication (2FA) wherever available
  4. Use a password manager to generate unique passwords for every site

What Makes a Strong Password?

CharacteristicWeakStrong
Length8 characters16+ characters
CharactersLetters onlyLetters + numbers + symbols
PatternDictionary wordRandom characters
ReuseSame everywhereUnique per site
StorageWritten on paperPassword manager

Generate Strong Passwords

Our Password Generator creates cryptographically random passwords:

  • Choose length (8-128 characters)
  • Include/exclude: uppercase, lowercase, numbers, symbols
  • Copy with one click
  • Generate in bulk

Everything runs in your browser — no passwords are sent to any server.

Understanding Password Hashing

When websites store your password, they should hash it — converting it into a fixed-length string that can't be reversed. Our Hash Generator lets you see how hashing works:

  • MD5: 128-bit hash (outdated, insecure)
  • SHA-256: 256-bit hash (current standard)
  • SHA-512: 512-bit hash (maximum security)
  • bcrypt: Password-specific hash with built-in salt

If a service stores passwords in plain text (no hashing), run away.

Password Security Checklist

  • Check your email against breach databases
  • Change any compromised passwords immediately
  • Use a unique password for every account
  • Make passwords at least 16 characters long
  • Enable 2FA on all important accounts
  • Use a password manager (Bitwarden, 1Password, KeePass)
  • Never share passwords via email or messaging

Secure Your Accounts Now

Start with an Email Breach Check to see where you stand, then use our Password Generator to create bulletproof passwords for every account.

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