Next Generation Password Strength & Leak Checker

The breach checker uses secure cryptographic hashing, specifically the SHA-1 algorithm followed by range queries.

Your password is converted into a hash (a mathematical fingerprint), and we check only the first few characters of that hash against our breach database. This method, called k-anonymity, ensures your actual password never reaches our servers while still confirming whether it's been compromised.

It's the same privacy-preserving technique used by industry leaders like Have I Been Pwned.

Our estimates are based on current computational capabilities and realistic attack scenarios.

For a standard desktop computer, we calculate attempts per second at approximately 1 billion (1 GHz). Gaming PCs with modern GPUs reach 100+ billion attempts per second, and supercomputers can process trillions of attempts.

These are conservative estimates—real attackers with distributed networks or custom hardware might work faster.

The time estimates assume a purely random password; human-created passwords with patterns crack significantly faster, which is why our checker analyzes for common patterns.

If your password is found in a breach database, take immediate action:

• First, generate a new strong password using our password generator tool.
• Second, change the password on the account where you used this compromised password.
• Third, change it on any other accounts where you may have reused it.

Finally, monitor those accounts for suspicious activity over the following weeks. Consider setting up fraud alerts with your bank or credit bureau if the breached account had financial information.

Importantly, the presence of your password in a breach database doesn't guarantee your account has been accessed, it means the password exists in stolen data and should be changed as a precaution.

Modern Login Phrase or Password best practices recommend minimum 12 characters for standard accounts and 16+ characters for high-value targets (email, banking, cryptocurrency).

Length is exponentially more important than complexity, a 16-character password with only lowercase letters is harder to crack than an 8-character password with mixed case, numbers, and symbols.

For maximum security with memorable passwords, consider passphrases using multiple unrelated words (like "correct horse battery staple"), which are both easy to remember and extremely difficult to crack.

Our local credential storage is encrypted with AES-256 bit encryption directly in your browser storage—not on our servers.

It's useful for testing multiple passwords or keeping temporary encrypted records during the password recovery process.

However, for long-term password management, we recommend using dedicated password managers like Bitwarden, 1Password, or KeePass. These tools are specifically designed for secure password storage with additional features like autofill, cross-device sync, and security breach alerts.

Never reuse the same password across multiple accounts, regardless of where you store them.

In theory, no stronger passwords are always better from a security standpoint.

However, practically speaking, extremely long random passwords (25+ characters) that you can't remember are less useful than shorter memorable passwords because you'll likely write them down (defeating the security).

This is why password managers are essential—they enable you to use extremely strong, unique passwords for every account without memorization.

If you're manually typing passwords, aim for 14-16 characters that balance strength with usability. For critical accounts managed by password managers, 20+ character passwords provide exceptional security.

Test secret passwords whenever you create new ones or make changes.

Additionally, periodically check existing passwords (monthly or quarterly) to ensure they maintain strength—especially if you've learned your password habits may be weaker than you thought.

Acting as your own tester helps identify vulnerabilities before attackers do. After major data breaches affecting multiple platforms, test your passwords again to verify they haven't appeared in new breach databases.

The password strength checker is always available at no cost, so there's no harm in regular testing to maintain security awareness.