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

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.

A Yes, it does. Our password checker scans against a dictionary of 10,000 common passwords, keyboard patterns like 'qwerty', and sequential numbers. For example, 'P@ssw0rd' looks complex but gets flagged immediately. The tool also catches leetspeak substitutions, so 'Tr1ckyP@ss!' won't fool it. If you see a low score despite mixed characters, your password likely contains a recognizable word or pattern. Try replacing whole words with random phrases instead.

A Not necessarily. Length boosts entropy, but a long password made of one repeated character like 'aaaaaaaaaaaaaaaa' gets a terrible score. Our checker detects repetition and penalizes it harshly. A 16-character random phrase beats a 30-character patterned string every time. For concrete numbers: 'correct horse battery staple' scores higher than 'pppppppppppppppppppppppppppp'. Think of entropy as a mix of length, variety, and unpredictability. Short and weird often beats long and predictable. Test both in our tool and watch the crack time estimates differ wildly.

A Most of the time, yes, but not always. A 20-character random string from a manager scores near-perfect. However, if the generator uses only lowercase letters, your score drops noticeably. Our tool flags that limited variety. Try it yourself: generate a 16-char password with symbols versus one without. The difference in crack time is stark. A good manager lets you pick character sets. Use uppercase, lowercase, numbers, and symbols. That combo typically yields centuries of estimated crack time.