About the Handiwork Password Strength Checker
The Password Strength Checker provides a local heuristic review of length, character types, a small set of obvious passwords, repeated characters, and predictable sequences. It also shows an upper-bound search-space estimate and an illustrative offline guess time under a uniform-random model. Those numbers do not measure the true predictability of a human-created password or guarantee that an account is safe.
How to use the Handiwork Password Strength Checker
- Type or paste the password you want to test into the field.
- Read the heuristic rating, generated search-space estimate, and illustrative offline guess time.
- Follow the warnings and suggestions to strengthen it, watching the meter update live.
How password strength is measured
The numeric estimate is length × log₂(character-pool size). That formula is appropriate for a value chosen uniformly by a generator, but it overstates human-created passwords because people choose words, dates, substitutions, and patterns unevenly. The tool applies a few transparent penalties, but it is not a full password-cracking model or a breached-password lookup.
What the crack-time estimate means
The displayed time divides half of the estimated uniform search space by ten billion guesses per second. It is an illustration, not a forecast: real speeds depend on the password hash, hardware, attacker strategy, leaked data, and whether the password was actually random. A common or patterned value may be guessed almost immediately regardless of the displayed upper bound.
Common weaknesses it catches
Length and character variety are not enough on their own. The checker flags a small built-in set of extremely common examples, three repeated characters, and short keyboard or alphabet sequences such as “abc”, “123”, and “qwerty”. It cannot compare against the full set of compromised credentials or recognize every name, phrase, date, language, and personal pattern.
Your password stays private
This tool never sends your password anywhere — all analysis happens in your browser using JavaScript, and nothing is saved. That said, the safest habit is to test the style of password you plan to use rather than a real, in-use credential, and to store unique passwords for every account in a reputable password manager.
Assumptions and limitations
- Do not enter a real in-use credential into any website unless you fully trust the page and device. Testing a similar pattern is safer.
- The common-password list and pattern checks are intentionally small and local. A clean result does not mean a password has never appeared in a breach.
- Account security also depends on uniqueness, secure storage, multi-factor authentication, phishing resistance, and the service’s password hashing and rate limits.
Sources and standards
These authoritative references were used to verify the method and guidance on this page.
Frequently asked questions
Is it safe to type my password here?
The analysis code runs locally in your browser and Handiwork does not submit the field to its server. Still, the safest practice is to test a similar pattern rather than an exact live credential, and only use trusted devices and pages.
What is a good entropy value?
There is no universal safe bit threshold for a human-created password. On this page, the number is an upper-bound search-space estimate that is meaningful only when characters were chosen uniformly at random. Length, uniqueness, and random generation matter more than chasing a label.
Why is my long password still rated weak?
Length helps, but predictable patterns hurt. Common passwords, repeated characters, and sequences like “123” or “qwerty” are easy for cracking tools to guess, so the checker reduces the score when it detects them even if the password is long.
How is the crack time calculated?
It assumes an offline attacker making ten billion guesses per second and a password selected uniformly from the inferred character pool. Both assumptions can be wrong, so the number is an educational comparison only—not a prediction or guarantee.
What makes a strong password?
Length and unpredictability. Use 16 or more characters that mix uppercase, lowercase, numbers, and symbols, avoid dictionary words and patterns, and never reuse a password. A random passphrase or password-manager-generated string is ideal.