Password Strength & Crack-Time Checker Community
Questions, answers and tips from people who use the Password Strength & Crack-Time Checker. Real entropy-based analysis of a password's actual strength and an estimated real-world crack time, computed locally.
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This page shows only real posts from real people, so it starts empty. The guide below has the questions people most often have about the Password Strength & Crack-Time Checker. Pick one to start a thread, or write your own.
From the tool guide: common questions about Password Strength & Crack-Time Checker
The items below are not posts by community members. They come from the written guide for this tool and are here to get a conversation started. Use “Ask a follow-up” to open a thread about any of them.
Is my password ever sent anywhere to check this?
No — this is one of the few checks on the site that needs zero network transmission at all, since strength analysis and crack-time estimation are pure local calculations; nothing about your password ever leaves your browser.
From the tool guide Ask a follow-upHow is this different from the Password Breach Checker?
The Breach Checker safely checks whether a password has appeared in known real data breaches (using a privacy-preserving method that never sends the full password). This tool instead analyzes the password's own inherent strength and estimates crack time — a genuinely different question that doesn't require checking against any external database at all.
From the tool guide Ask a follow-upHow is 'crack time' actually estimated?
From the password's real effective entropy (raw character-set entropy minus real deductions for detected patterns), divided by a typical guesses-per-second rate for two real scenarios — a slow, rate-limited online login attempt, and a fast offline brute-force attempt — giving two different, honestly-labeled real-world estimates.
From the tool guide Ask a follow-upWhat patterns does it detect?
Common dictionary words, keyboard-adjacent sequences (like qwerty or asdf), simple character repetition, and common character substitutions (like '@' for 'a' or '0' for 'o'), all of which measurably reduce a password's real-world guessability below its raw entropy number.
From the tool guide Ask a follow-upShould I use this instead of the Password Generator?
They serve different steps — use the Password Generator to create a new strong random password, and this tool to evaluate the real strength of a password you already have in mind or are reusing.
From the tool guide Ask a follow-upIs my data stored?
No, nothing about the password you type is saved, logged or transmitted.
From the tool guide Ask a follow-upWhat this tool does
This is a different tool from this site's Password Breach Checker (which checks a password against known leaked-password databases) and Password Generator (which creates new random passwords) — this one analyzes the actual strength of a password you're considering, computing its real character-set entropy in bits and then applying real, pattern-aware deductions for common weaknesses like dictionary words, keyboard patterns (qwerty, asdf), repeated characters and simple substitutions (like '@' for 'a') that a pure entropy formula alone would miss.
How to use it, step by step
- Type a password into the field (it's never sent anywhere).
- See its real calculated entropy in bits.
- Review the pattern-based weaknesses detected, if any.
- See the estimated real-world crack time under both online and offline attack scenarios.
Tips from the guide
- Raw entropy alone overstates real-world strength if the password follows a common pattern — always check the pattern-based deductions, not just the bits-of-entropy number, for a realistic picture.
- Crack-time estimates are necessarily approximate and depend heavily on real attacker resources and whether rate-limiting is enforced — treat the numbers as a relative comparison between choices, not an exact guarantee.
- A long, truly random passphrase (several unrelated real words) often beats a shorter complex-looking password with obvious substitutions, because pattern-aware analysis catches predictable substitutions that pure length/complexity rules miss.
Common mistakes to avoid
- Judging password strength by length or character variety alone without accounting for real predictable patterns like dictionary words or keyboard walks.
- Reusing a 'strong-looking' password with a small tweak (like incrementing a number) across many accounts, which real attackers specifically anticipate and check for.
- Treating a good crack-time estimate as a permanent guarantee — re-check and update passwords periodically, and always pair a strong password with two-factor authentication where available.
Who uses it
- Anyone choosing a new account password. Get a real, pattern-aware strength read before committing to a password, not just a length check.
- IT and security-conscious teams setting password policy guidance. Understand concretely how much common patterns weaken a password versus its raw length.
- Anyone reusing or slightly modifying an old password. See how much a small variation (like adding a year) really helps or doesn't.
How to ask a question people can answer
A good thread on the Password Strength & Crack-Time Checker saves everyone time. Start with a title that names the exact problem, such as the input you used, the result you expected and the result you got. A title like “Not working” is hard to answer, while a title with the specifics gets replies quickly.
- Say what you tried. List the steps you followed and any settings you changed, so replies do not repeat what you already did.
- Share a small example. A short sample input and the output you saw is worth more than a long description. Remove anything private first.
- Mention your setup. Your device, browser and whether you are on a phone or a computer can explain many odd results.
- One question per thread. Separate topics get clearer answers and are easier to find later with the search box above.
- Come back and reply. If a suggestion worked, say so and upvote it, and if you found the fix yourself, post it for the next person.
Community rules
Be kind, stay on topic and keep personal data out of your posts. Do not post adult, hateful or illegal content, advertising or repeated links. Every post is shown with its author’s username and date, and posts that break these rules can be hidden by moderators. This space is for help with the Password Strength & Crack-Time Checker and related tasks, and it is separate from the sitewide discussion forum where broader topics live.