Are passwords generated on this page stored or sent over the internet?

No. Every password is generated 100% locally inside your web browser using the native Web Crypto API (window.crypto.getRandomValues). No generated password is ever transmitted over the network, logged, or stored on any server.

What are ambiguous characters and when should I exclude them?

Ambiguous characters are letters, numbers, and punctuation marks that look nearly identical in many fonts—such as zero (0) and uppercase O, or one (1), lowercase l, uppercase I, and the vertical pipe (|). Enable 'Exclude ambiguous characters' whenever you need to read a password off a screen and type it manually onto a smart TV, gaming console, or router.

What is password entropy and how is it calculated?

Password entropy measures the unpredictability of a password in bits using the formula E = L × log2(R), where L is the password length and R is the size of the pool of unique possible characters. Every additional bit of entropy doubles the number of guesses an attacker needs to crack the password.

Free Online Random Password Generator

Q: How long should a strong password be in 2026?

Cybersecurity agencies (including NIST and OWASP) recommend at least 16 characters for email, banking, cloud storage, and admin accounts, and 20 to 24+ characters for Wi-Fi WPA3 keys, master passwords, and API secrets.

Create strong, unbreakable passwords locally in your browser using cryptographically secure randomness (window.crypto.getRandomValues). Customize length, character pools, and readability filters—with zero server tracking.

Generate a 16-Character Strong Random Password

Quick Presets:

Password Strength:

Very Strong

Cryptographic Entropy: 104.9 bits Est. Offline Crack Time (100B guesses/s): Centuries+

Length is 12+ characters
Contains uppercase letters (A–Z)
Contains lowercase letters (a–z)
Contains numbers (0–9)
Contains special symbols (@#$)

Batch Generate 10 Passwords

Password Length

Characters (4 – 128):

Quick Lengths:

8 Chars
9 Chars
10 Chars
12 Chars
14 Chars
15 Chars
16 Chars
20 Chars
22 Chars
24 Chars
25 Chars
32 Chars
64 Chars

Character Sets

Uppercase Letters (A–Z) Lowercase Letters (a–z) Numbers (0–9) Special Symbols (!@#$%^&*)

Readability & Compatibility Filters

Exclude ambiguous characters Removes look-alike characters (0, O, o, 1, l, I, |, `, ', ") for easier manual typing on TVs & phones. Use easy-to-type symbols only Restricts symbols to !@#$%^&*_-+=? (avoids brackets & pipes rejected by some legacy portals).

How to Use the Random Password Generator

Select Your Password Length: Adjust the length between 4 and 128 characters using the slider, number box, or Quick Length buttons in the right-hand settings panel. Cybersecurity standards recommend at least 16 characters for email, banking, and cloud accounts.
Customize Character Pools & Filters: Keep Uppercase, Lowercase, Numbers, and Special Symbols enabled for maximum cryptographic entropy—or check Exclude ambiguous characters when creating a password you will type manually on a mobile keyboard, smart TV, or router.
Verify Cryptographic Entropy: Check the live Cryptographic Entropy (bits) and Est. Offline Crack Time metrics below the password display, aiming for 80+ bits (green Very Strong rating).
Copy & Save in a Password Manager: Click Copy Current Password (or export 10 passwords at once from the Batch Generator) and store your credentials inside an encrypted password manager.

Password Length, Entropy & Brute-Force Crack Time Reference Table

Password strength depends on both the character pool size ($R$) and the password length ($L$), measured in bits of entropy ($E = L \times \log_2(R)$). The table below shows how long an offline attacker capable of testing 100 billion ($10^{11}$) hashes per second would need on average to brute-force different configurations:

Password Length	Character Pool	Entropy (Bits)	Avg. Brute-Force Crack Time	Recommended Use Case
6 Characters	Numbers Only (`0–9`)	19.9 bits	Instant (< 0.01 sec)	Device lock-screen PINs with hardware rate-limiting only
8 Characters	All Types (90 chars)	51.9 bits	~6 hours	Low-risk temporary throwaway accounts
12 Characters	All Types (90 chars)	77.9 bits	~46,000 years	Standard web logins & shopping accounts
16 Characters	All Types (90 chars)	103.9 bits	~3.1 trillion years	Primary Email, Banking, Password Manager & Admin Accounts
24–32 Characters	All Types (90 chars)	155.8 – 207.7 bits	Centuries+ (Mathematically Unbreakable)	Wi-Fi WPA3 Keys, SSH/API Secrets & Crypto Wallets

Why Use a Cryptographically Secure Password Generator?

True Browser-Native CSPRNG (window.crypto.getRandomValues): Unlike basic generators that rely on predictable Math.random() calls or biased array sorting, our tool uses your operating system's cryptographic entropy source with unbiased rejection sampling and Fisher–Yates shuffling.
100% Client-Side Privacy: Passwords are generated entirely in your browser's memory. Nothing is ever sent over the internet, logged in analytics, or stored in a database.
Defend Against Credential Stuffing & Dictionary Attacks: Using a unique, randomly generated 16+ character password for every service ensures that a data breach on one website never compromises your email, financial accounts, or cloud storage.

Frequently Asked Questions

Are passwords generated on this page stored or sent to any server?

No. Every password is generated 100% locally inside your browser using JavaScript's native window.crypto.getRandomValues() API. No generated password ever leaves your device—you can even disconnect from the internet after loading this page and the generator will continue to work offline.

How long should a strong password be in 2026?

Modern cybersecurity frameworks (NIST SP 800-63B and OWASP) recommend at least 16 characters for important accounts (email, banking, work logins) and 24 to 32 characters for Wi-Fi routers, database credentials, and API keys.

What does "Exclude ambiguous characters" do?

Many sans-serif fonts make zero (0) and capital O—or one (1), lowercase l, capital I, and the pipe symbol (|)—look almost identical. Checking Exclude ambiguous characters removes those look-alike characters from the pool so you never misread a password when typing it manually.

What if a website rejects certain special characters in my generated password?

Some older banking and government portals block brackets ({ } [ ] < >), slashes, or quotes. Simply check Use easy-to-type symbols only in the right-hand settings column to restrict symbols to the widely accepted set !@#$%^&*_-+=?, or click the Alphanumeric Only preset if symbols are prohibited completely.