What actually makes a password strong? Length and randomness, not symbol rules. This generator offers five modes, including EFF Diceware passphrases drawn from a 7,776-word list where each word adds 12.9 bits of entropy — a 5-word passphrase reaches roughly 64.5 bits, the threshold NIST SP 800-63B sets for memorized secrets. Every result is scored with Dropbox's zxcvbn and checked against Have I Been Pwned's 900+ million breached passwords using the k-anonymity API, so the password never leaves your device.
How Does the Max Intel Password Generator Work?
Max Intel's Password Generator creates cryptographically secure passwords using five toggleable random number generators — Web Crypto API, Chance.js (Mersenne Twister), seedrandom (ARC4), Math.random (Xorshift128+) and a timestamp mixer — with every non-cryptographic draw combined with an independent Web Crypto draw. It checks passwords against Have I Been Pwned's database of 900+ million breached passwords and analyzes strength with zxcvbn.
- CSPRNG (Cryptographically Secure PRNG)
- A pseudorandom number generator that produces output computationally indistinguishable from true randomness — required by NIST SP 800-90A for security applications including password generation.
- Shannon Entropy
- A mathematical measure of randomness in bits. A password with N equally likely characters from an alphabet of size A has entropy of N × log₂(A) bits. NIST recommends minimum 80-bit entropy for high-security passwords.
- zxcvbn
- A realistic password strength estimator (developed by Dropbox) that models actual attacker strategies — dictionary words, keyboard patterns, l33t substitutions, and date formats — rather than relying on simplistic character-class rules.
- HIBP (Have I Been Pwned)
- A breach notification service by Troy Hunt containing 900+ million compromised passwords. The k-anonymity API allows checking password breach status without exposing the full password hash.
Five Generation Modes
The generator supports five distinct modes to match different use cases. Random character mode creates traditional passwords from configurable character pools. Passphrase mode uses the EFF's curated 7,776-word Diceware list — each word adds 12.9 bits of entropy, and a 5-word passphrase provides approximately 64.5 bits — meeting the minimum threshold recommended by NIST SP 800-63B (Digital Identity Guidelines) for memorized secrets. PIN mode generates numeric codes with options to prevent sequential digits and duplicates. Pronounceable mode creates phonetically plausible passwords using consonant-vowel patterns that are easier to type and remember than pure random strings. Pattern mode lets you define exact character class sequences — useful for systems with rigid password composition requirements. Notably, NIST SP 800-63B Section 5.1.1 now advises against mandatory complexity rules (e.g., requiring symbols), finding that they reduce usability without meaningfully improving security.
Multi-Engine RNG for Algorithmic Diversity
Unlike typical password generators that rely on a single source of randomness, Max Intel's generator offers five toggleable RNG engines: the Web Crypto API (operating system entropy pool), Chance.js (a high-level random data generator), seedrandom (ARC4 cipher-based PRNG), the browser's native Math.random() (V8 xorshift128+), and a timestamp entropy mixer that combines performance.now() microsecond jitter with cryptographic randomness. Each character in your password is generated by a randomly-selected engine (chosen via Web Crypto), and every non-cryptographic draw is combined with an independent Web Crypto draw before it is used. This means a subtle bias or predictability in any single engine cannot weaken the password — each character is at least as random as Web Crypto alone.
| RNG Engine | Algorithm | CSPRNG | Speed | Use Case |
|---|---|---|---|---|
| Web Crypto API | OS entropy pool | Yes | Fast | Primary security-grade generation |
| Math.random | Xorshift128+ | No | Fastest | Cross-engine entropy mixing |
| Mersenne Twister | MT19937 | No | Medium | Statistical quality verification |
| LCG | Linear Congruential | No | Fast | Additional entropy source |
zxcvbn Pattern Analysis
Based on Dropbox's open-source password strength estimator, cited by OWASP Password Storage Cheat Sheet as a recommended approach for realistic strength assessment.
Beyond simple entropy calculation, Max Intel uses Dropbox's zxcvbn library — the same algorithm used by major password managers like 1Password and Bitwarden. Once you’ve generated a strong password, store it in a zero-knowledge manager such as Proton Pass affiliate so it stays encrypted and synced across your devices. Unlike naive strength checkers that only count character types, zxcvbn detects real-world attack patterns: dictionary words (including common substitutions like p@ssw0rd), keyboard spatial patterns (qwerty, zxcvbn), repeated characters, sequential patterns, dates, and names. It then estimates realistic crack times based on how actual password cracking tools work. This gives you actionable feedback about why a password is weak, not just that it is.
How Long Would It Take to Crack Your Password?
Every generated password is instantly analyzed for entropy (measured in bits), character composition, and estimated crack times across three scenarios: an online attack throttled to 1,000 guesses per second, an offline GPU attack at 100 billion guesses per second (reflecting modern hashcat performance against unsalted MD5 hashes), and a theoretical quantum attack using Grover's algorithm which effectively halves the security bits. The visual entropy meter and composition breakdown help you understand exactly why a password is strong or weak.
Is It Safe to Check a Password Against a Breach Database?
As of 2026, Have I Been Pwned tracks billions of compromised accounts across 1,015+ breached websites, making it the most comprehensive credential breach database available.
The breach check feature uses the Have I Been Pwned Passwords API with k-anonymity protection. Your password is SHA-1 hashed locally in your browser, and only the first 5 characters of the hash prefix are sent to the HIBP API. The API returns all matching hash suffixes from its database of over 900 million breached passwords, and your browser checks locally whether your password's full hash appears in the results. This means your password — or even its complete hash — never leaves your device.
Policy Compliance Testing
Tests against NIST SP 800-63B, PCI DSS v4.0 Requirement 8, and common enterprise policies. NIST's 2025 guidance (SP 800-63B-4, finalized July 31, 2025) emphasizes password length over complexity, recommending a minimum of 8 characters — with a recommended 15-character minimum where it's the only factor — no upper limit, and mandatory breach database screening.
Generated passwords are automatically tested against three common security policy frameworks. NIST SP 800-63B emphasizes password length and breach database checks over complexity requirements. PCI DSS requires a minimum of 7 characters with a mix of numeric and alphabetic characters. Standard corporate policies typically require 12+ characters with uppercase, lowercase, digits, and symbols. The compliance checker tells you whether your password would pass each policy.