Password Strength Checker

Password Strength Checker — How Secure Is Your Password?

A weak password is the most common cause of account breaches. This tool instantly analyzes your password against recognized security criteria and gives you practical tips to improve it — everything happens in your browser with no data sent anywhere.

How Password Strength Is Measured

• Length: Longer is always stronger — 12 characters minimum, 16+ for maximum protection
• Variety: Mixing uppercase, lowercase, numbers, and symbols massively increases complexity
• Entropy: A mathematical measure of randomness — higher bits means harder to crack
• No patterns: Avoiding dictionary words, sequences, and repetitions

What Is the Estimated Crack Time?

The tool calculates crack time assuming a brute-force attack at one billion attempts per second. An 8-character password can be cracked in hours, while a 16-character mixed password would take millions of years.

How to Use the Tool

1. Type or paste your password into the input field
2. See the instant result with strength meter and score
3. Review the checklist to identify weaknesses
4. Follow the suggested tips to improve your password

Password Score Scale

• 0-2 / Very Weak: Easily cracked — must be changed immediately
• 3-4 / Weak: Vulnerable to dictionary and brute-force attacks
• 5-6 / Fair: Better, but still improvable
• 7-8 / Good: Reasonably secure for most uses
• 9 / Strong: Well-protected against most attack types
• 10 / Very Strong: Maximum security — excellent password