Password Strength Checker: Test How Strong Your Password Is | Free

A 12+ characters with a mix of uppercase, lowercase, numbers, and special characters. Avoid common words and repeated characters.

A Yes.

A The crack time estimate is a computational prediction based on current brute-force attack capabilities and your password's entropy. While it offers a strong indication of vulnerability, it's a theoretical estimate, not a guarantee. Real-world cracking depends on many factors, including attacker resources and methods. Use it as a powerful guide to assess and improve your password security, always aiming for estimates in years or millennia.

A A local password strength checker, like this one, processes your password entirely within your web browser. This means your password never leaves your device and is not sent to any external server, ensuring maximum privacy and security. In contrast, server-based tools transmit your password over the internet to be analyzed, which carries inherent risks of data interception or storage. Opting for a local tool eliminates these privacy concerns, making it a safer choice for evaluating sensitive credentials.

A The crack time is an estimate of how long it would take a hacker to guess your password using brute-force methods. For example, a password estimated to take 200 years to crack is significantly stronger than one that could be guessed in 5 minutes. Our tool uses advanced algorithms to give you this projection. Aim for estimates measured in centuries or more for best security.

A Technically yes, but it's risky. An 8-character password with mixed types might take a few months to crack. Modern GPUs can test billions of combinations per second. Our tool will show you the real crack time estimate. Aim for 12 characters minimum. Even adding 4 more characters multiplies security by trillions.

A Spaces are valid characters that increase your password's character set size, which boosts entropy. Our tool counts them like any other symbol. A space in the middle of your password adds complexity, but don't rely on spaces alone. Combine them with uppercase letters, numbers, and special characters for real strength. For example, 'My Secure P@ss 2024!' scores higher than 'mys ecure pass'.

A No, but our tool won't stop you from typing it. A reused password could score high on entropy yet be compromised from a previous breach. Your crack time might show centuries, but that estimate assumes nobody already knows your password. Check haveibeenpwned separately for breaches. Treat each password as unique.

A No, it doesn't. We deliberately avoid sending any data to external services like Have I Been Pwned. That connection could expose your password to a third party. Our tool only analyzes structure and entropy right in your browser. Want to check for past breaches? Do that separately, on the official HIBP site. A strong password today won't help if it's already leaked somewhere.

A Length alone isn't everything — character variety matters just as much. A 20-character lowercase password has only 26 possibilities per slot. That's about 2 × 10^28 combinations. But a 10-character password using uppercase, lowercase, numbers, and symbols gives you 94 options per character, totaling roughly 5 × 10^19 combos. Our tool calculates the actual entropy bits, and symbols win here. Your crack time drops from centuries to decades. Mix types even in long passwords for best results.