Strong Password Generator
Create a secure, cryptographically random password in one click. Customize the length, mix in symbols and numbers, and copy it instantly. Nothing is ever sent to a server.
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Generated a strong password? Now make sure you never forget it.
Aura includes a built-in password manager to securely store every password you generate — plus dark web monitoring to alert you if your credentials ever appear in a breach.
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What Makes a Password Truly Strong?
Our generator applies the four principles that security experts and NIST guidelines recommend.
Length Is the Single Biggest Factor
Every additional character multiplies the number of possible combinations exponentially. An 8-character password has roughly 200 trillion combinations. A 16-character password from the same pool has 200 septillion — a trillion times more. We default to 16 and recommend 20+ for critical accounts.
Cryptographic Randomness, Not Human Guessing
Human-chosen passwords follow unconscious patterns — keyboard walks, favorite numbers, predictable substitutions. Our generator uses crypto.getRandomValues(), the same cryptographic API used by security software and browsers, producing truly unpredictable output every time.
Character Diversity Expands the Search Space
Using only lowercase letters gives attackers a pool of 26 characters. Add uppercase, digits, and symbols and the pool expands to 95+. Each position multiplies, so a 16-character password with all types has roughly 1031 possible combinations — effectively uncrackable with any foreseeable hardware.
Unique Password for Every Account
Reusing passwords is the leading cause of account takeovers. Attackers buy breach databases and immediately try the same credentials everywhere (credential stuffing). A generated, unique password per account means one breach never cascades into many. Store them in a password manager — that's what they're built for.
How Long Should a Strong Password Be in 2026?
NIST's current guidelines (SP 800-63B) recommend a minimum of 8 characters, but security researchers broadly agree that 12–16+ is the practical standard for anything that matters. The reason: as GPU computing power grows, brute-force attack speeds increase. What took a decade to crack in 2015 might take a year in 2026.
A 16-character password using all four character types produces approximately 100+ bits of entropy — enough that no foreseeable computing advancement makes it crackable in your lifetime. Our generator defaults to 16 for this reason, with the slider going up to 64 for those who want maximum security.
The real answer to "how long?" is: as long as possible while remaining practical. Since you're using a password manager, 20–32 characters costs you nothing in convenience and provides enormous security margins. Read our full guide on common password mistakes people still make to understand what most people get wrong.
Why You Need a Different Password for Every Account
Data breaches happen constantly — hundreds of millions of credentials are stolen every year. When a site you use is breached, attackers compile those email/password pairs into lists and run them against thousands of other services automatically. This is called credential stuffing, and it's one of the most common ways accounts get taken over.
The defense is simple: one unique password per account. If your password for a low-security forum is breached, it can't be used anywhere else. This is only achievable with a password generator and manager — no human can create and remember 50 unique strong passwords. Learn more about how hackers steal passwords and how to tell if your password is strong enough.
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Frequently Asked Questions
Everything you need to know about generating and managing strong passwords.
Yes — completely. Every password is generated entirely in your browser using the Web Crypto API (crypto.getRandomValues()), which is the same cryptographic standard used by security software. No password is ever sent to a server, stored, or logged. You can disconnect from the internet and the generator works exactly the same. Your generated passwords stay on your device and never leave it.
For most accounts, 16 characters is the sweet spot — it provides effectively uncrackable entropy while remaining manageable. For high-value accounts like email, banking, and password managers, use 20+ characters. Since you're storing passwords in a password manager anyway, length becomes almost free — set it to 20–32 and never think about it again.
Yes, symbols are recommended for any account that allows them. Adding symbols expands the character pool from around 62 characters (letters + digits) to 95+, multiplying the number of possible combinations by roughly 20–30x for each character position. That said, some sites restrict certain symbols — if a generated password is rejected, try regenerating with symbols disabled.
Humans are terrible at generating randomness. We unconsciously favor certain patterns, letters near each other on the keyboard, or combinations that 'feel' random but follow predictable rules. Our generator uses cryptographically secure randomness (the same algorithm used by encryption software) and guarantees at least one character from each enabled character type, then shuffles using Fisher-Yates — the gold standard for unbiased randomization.
You don't — and that's the point. Generated passwords are designed to be impossible to memorize, which forces you to store them in a password manager. A password manager like Aura, 1Password, or Bitwarden stores every password securely and auto-fills them for you. The only password you need to memorize is your master password. This is the correct model for modern password security.
Entropy measures how unpredictable a password is, expressed in bits. It's calculated as log2(pool_size ^ length). A password with 128 bits of entropy would take longer than the age of the universe to crack even with a billion-guess-per-second attack. Our strength meter estimates entropy based on your selected character types and length, so you can see exactly how strong each generated password is.
Absolutely — this is one of the most important security practices you can adopt. When a website is breached (which happens constantly), attackers immediately try those credentials on hundreds of other services in a technique called credential stuffing. If you reuse passwords, a breach at one low-security site can compromise your email, bank, and social media. Generated, unique passwords per account are the solution.
A 12-character password using all four character types (lower, upper, digits, symbols) provides around 79 bits of entropy — still very strong by current standards. However, as computing power grows and GPU-based cracking becomes cheaper, 16+ characters provides a comfortable safety margin. Our generator defaults to 16 for this reason. For anything truly critical, 20 characters or more is recommended.
Yes, and it's a great idea. Wi-Fi passwords are a common attack vector — dictionary attacks against WPA2 networks are trivial with GPU acceleration. A 20+ character random password makes your Wi-Fi essentially immune to brute-force attacks. Since you only type your Wi-Fi password into new devices occasionally, the complexity is a small inconvenience for a major security gain.
Generate a new one immediately and update the account. Check haveibeenpwned.com to see if your email appears in known data breaches. If you use a password manager with breach monitoring (like Aura), you'll be alerted automatically when your credentials appear in a breach. Never reuse the compromised password — delete it from your manager and replace it everywhere it was used.