Password Generator & Analyzer
Generate secure passwords and measure their strength.
Generador Diceware
How do you generate a secure password and check its strength?
Docuboxer's password tool does both halves of the job: it generates strong random passwords, and it analyzes any password you type — scoring its strength, estimating how long it would take to crack, and flagging the specific weaknesses that make it vulnerable, from short length to predictable patterns. Everything runs 100% locally in your browser: nothing you generate or type is ever transmitted, logged or stored, which is the only acceptable arrangement for a tool that handles passwords. Use the generator when creating a new account, and the strength checker to audit the passwords you already rely on — the analysis follows modern guidance, where length matters more than clever symbol substitutions. The tool works offline once the page has loaded, and it's free with no signup. Pair it with a password manager: generate here, store there, reuse nowhere.
How to use Password Generator & Analyzer
- Generate a strong password instantly, or type the password you want to evaluate into the analysis field.
- The analyzer instantly scores its strength, showing the estimated time to crack and any weaknesses detected.
- Review the personalized recommendations to harden your password following current security best practices.
Common use cases
Create strong passwords for new accounts
Generate random, high-entropy passwords for banking, email and social accounts instead of reusing variations of the same phrase across services.
Check passwords before you commit to them
Evaluate the strength of a password you're about to use and see whether it would survive brute-force and dictionary attacks — before an attacker runs the same test.
Audit corporate password policies
Verify that the passwords your organization mandates meet modern standards like NIST guidance, checking minimum length, entropy and resistance to computational attacks.
Teach password hygiene with evidence
The crack-time estimate turns an abstract lecture into a concrete number — showing someone their password falls in seconds is more persuasive than any policy document.
Test real passwords without exposure
Because the analysis is 100% local, nothing you type leaves your device — the one non-negotiable property for a password tool.
Frequently asked questions
Is it safe to type my real password into this tool?
Yes — the analysis runs 100% in your browser. The password never leaves your device and is never stored anywhere. As a general security habit, you can also test a similar variant instead of the exact one.
What makes a password strong?
Length is the single most important factor (12 characters minimum), followed by character variety (upper, lower, digits, symbols), the absence of common patterns, and not appearing in known data breaches.
How is the time to crack estimated?
From the password's entropy: how many combinations an attacker would need to try given its length and character variety, at realistic attack speeds. It's an estimate, but it separates passwords that fall in seconds from ones that hold for centuries.
Is a long password really better than a complex one?
Yes. Each added character multiplies the search space, while swapping letters for symbols (p@ssw0rd) barely helps — attackers try those substitutions first. A long passphrase of random words beats a short 'complex' password.
How often should I change my passwords?
Modern guidance (including NIST) says: don't rotate on a schedule — change a password when there's a reason, like a breach or suspected exposure. Forced rotation pushes people toward weak, predictable variations.
Should I use a password manager?
Yes. Generate a unique strong password per service and let a manager remember them. Reuse is the biggest practical risk: one breached site exposes every account sharing that password.