Password & Passphrase Generator

Generate strong, random passwords instantly. Customize length, include uppercase, lowercase, numbers, and symbols. Or switch to passphrase mode for a memorable string of random words drawn from the 7,776-word EFF list. Everything is generated locally in your browser.

16 characters
No password generated yet
Entropy:
0 bits
Crack Time (Est.):
N/A
Character Sets:
None

Password History

Passwords are stored locally in your browser and never sent to our servers.
No saved passwords yet. Generate and save passwords to see them here.

Custom Password Patterns

Create passwords based on specific patterns. Use the following placeholders to define your pattern:

A Uppercase Letter
a Lowercase Letter
0 Digit
! Special Character
* Any Character
\char Literal Character

Common Patterns

Your Privacy & Security

This password generator works entirely in your browser. Passwords are generated locally and never transmitted to our servers. The page can be saved and used offline for maximum security.

Creating Strong Passwords

A strong password is your first line of defense against unauthorized access to your accounts. Here are some guidelines for creating secure passwords:

Strong Password Characteristics

  • Length: At least 12-16 characters
  • Complexity: Mix of upper and lowercase letters, numbers, and symbols
  • Uniqueness: Different for each of your accounts
  • Randomness: Not based on dictionary words or personal information
  • Unpredictability: No common substitutions (@ for a, 0 for o)

Password Weaknesses to Avoid

  • Personal information: Names, birthdates, or pet names
  • Dictionary words: Even with numbers appended
  • Common patterns: 123456, qwerty, password1
  • Reusing passwords: Across multiple accounts
  • Sharing passwords: With others, even trusted contacts

Passphrase generator: why four random words beat a short complex password

A passphrase is a string of words picked at random, something like quiver-onset-mango-fable. Switch this passphrase generator to Passphrase mode and every word is drawn from the EFF large wordlist, the 7,776-word Diceware list the Electronic Frontier Foundation published in 2016. Each pick uses your browser's cryptographic random number generator, so every word carries the same 12.92 bits of entropy, which is log2 of 7,776, whatever word happens to come up.

That fixed rate makes the arithmetic easy to check. Four words give 51.7 bits, five give 64.6, six give 77.5. Here is how that lines up against random characters from the full 94-key keyboard set:

Secret How it is built Entropy Can you memorise it?
4 random words 7,7764 combinations 51.7 bits Yes
5 random words 7,7765 combinations 64.6 bits Usually
6 random words 7,7766 combinations 77.5 bits With practice
8 random characters 948 combinations 52.4 bits No
12 random characters 9412 combinations 78.7 bits No

Four words and an eight-character password sit within a bit of each other, and six words match a twelve-character one. The difference is that you can hold the words in your head and type them on a phone keyboard without hunting for symbols. Nothing here depends on the list being secret. An attacker knows exactly which 7,776 words you drew from, and the figures above already assume that.

When to use which. Reach for a passphrase generator for the handful of secrets you have to type from memory: your password manager's master password, your device login, your disk encryption key. Use a long random character password for everything else, because the password manager types those for you and extra length costs you nothing.

How to store one. Write a new master passphrase on paper and keep it where you would keep a passport, at least until you have typed it twenty times from memory. Never store your master passphrase inside the vault it unlocks. If a site rejects spaces or caps the length, set the separator to a hyphen and switch on "Add a number", then read the entropy figure again before you commit to it.

How to Manage Strong Passwords

Having strong, unique passwords for all your accounts presents a challenge: how do you remember them all? Here are some approaches:

Password Manager

Use a reputable password manager to generate, store, and auto-fill strong passwords. You'll only need to remember one master password.

Pros

  • Stores unlimited passwords
  • Generates strong passwords
  • Cross-device syncing
  • Auto-fill capability

Cons

  • Single point of failure
  • May require subscription
  • Learning curve

Password Notebook

Write passwords in a physical notebook kept in a secure location. Simple but requires physical security and manual updates.

Pros

  • No digital vulnerabilities
  • No technical knowledge required
  • No subscription needed

Cons

  • Vulnerable to physical theft
  • No backup if lost
  • Inconvenient when away from home

Two-Factor Authentication

Even the strongest password can be compromised. Add an extra layer of protection to your accounts by enabling two-factor authentication (2FA) whenever possible.

Password Entropy and Strength

Password strength is measured in "entropy" - the randomness or unpredictability of a password. The higher the entropy, the more resistant a password is to brute force attacks.

Password Length Character Set Number of Possible Combinations Time to Crack*
8 characters Lowercase only (26) 208 billion Hours to days
8 characters Mixed case, numbers, symbols (94) 6 quadrillion Days to weeks
12 characters Mixed case, numbers, symbols (94) 475 septillion Centuries
16 characters Mixed case, numbers, symbols (94) 3 undecillion Astronomical

* Estimated time for a modern computer performing a sophisticated brute force attack. Actual times vary based on attacker resources.

About Password Generator

What does this tool do?

Our Advanced Password Generator creates cryptographically secure passwords with customizable strength, character types, and readability options. It includes password strength analysis, secure local storage, custom pattern generation, and encrypted sharing capabilities for team password distribution.

Why is this useful?

Strong, unique passwords are the foundation of digital security. Our tool eliminates the guesswork by generating truly random passwords that resist brute force attacks, dictionary attacks, and social engineering attempts while providing tools to securely share and manage them.

Who uses this tool?

  • Individual users - Create strong passwords for personal accounts and services
  • IT administrators - Generate secure passwords for system accounts and temporary access
  • Security professionals - Create test credentials and demonstrate password complexity
  • Developers - Generate API keys, tokens, and application passwords
  • Teams and organizations - Securely share temporary passwords and access credentials

How to generate secure passwords

  1. Set desired password length (12-16 characters minimum recommended)
  2. Select character types: uppercase, lowercase, numbers, and symbols
  3. Choose readability options to exclude confusing characters if needed
  4. Enable cryptographically secure generation for maximum security
  5. Review the strength meter and entropy analysis
  6. Copy the password and optionally save to local history

Example

A 16-character password like "7K#mP2$vN9@xL4wQ" provides over 100 bits of entropy, making it virtually impossible to crack with current technology. The built-in strength analyzer confirms this level of security.

Understanding password strength

Entropy (bits)
Measures password randomness and unpredictability. Higher entropy means stronger security against brute force attacks.
Estimated Crack Time
Theoretical time needed to break the password using sophisticated brute force methods with modern computing power.
Character Sets
Number of possible characters used. More character sets (uppercase, lowercase, numbers, symbols) increase password strength exponentially.
Cryptographic Security
Uses browser's crypto.getRandomValues() for true randomness instead of predictable pseudo-random generators.
Pattern Recognition
Custom patterns allow structured passwords while maintaining security through randomness within each character class.

Strong password indicators

  • Length 12+ characters: Exponentially increases security against attacks
  • Mixed character types: Upper, lower, numbers, and symbols
  • High entropy (70+ bits): Ensures true randomness and unpredictability
  • No dictionary words: Resistant to dictionary and hybrid attacks

Weak password patterns to avoid

  • Short length (under 8 chars): Vulnerable to brute force attacks
  • Single character type: Dramatically reduces possible combinations
  • Personal information: Names, dates, addresses can be guessed
  • Common substitutions: @ for a, 0 for o, 3 for e are easily cracked

Security best practices

  • Use unique passwords for every account - never reuse passwords
  • Store passwords in a reputable password manager when possible
  • Enable two-factor authentication for additional security layers
  • Regularly update passwords for critical accounts
  • Be cautious when sharing passwords - use encrypted methods

Common use cases

Personal Account Security

Generate strong passwords for email, banking, social media, and other personal accounts to protect against unauthorized access and identity theft.

Business & IT Administration

Create secure passwords for system accounts, databases, Wi-Fi networks, and temporary employee access with appropriate complexity requirements.

Development & Testing

Generate random strings for API keys, authentication tokens, test data, and development environment credentials with specific character requirements.

Team Password Sharing

Securely distribute shared account credentials within teams using encrypted links that self-destruct after viewing for maximum security.

Advanced features

Custom patterns allow structured passwords like "Word-1234-Symbol" while maintaining randomness. The secure sharing feature encrypts passwords client-side before creating time-limited, view-limited links for safe distribution.

Privacy and security

All password generation happens locally in your browser using cryptographically secure random number generation. No passwords are transmitted to our servers, ensuring complete privacy and security.