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Generate Secure Random Passwords in Your Browser Generate strong, secure passwords with customizable length, character types, and exclusion options.

Password Generator illustration
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Password Generator

Generate strong, secure passwords with customizable length, character types, and exclusion options.

1

Set Length

Choose password length (8-128 characters).

2

Select Characters

Toggle uppercase, lowercase, numbers, symbols, and ambiguous exclusion.

3

Generate & Copy

Click Generate then copy to clipboard.

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What Is Password Generator?

A Password Generator is a software tool designed to create unique, cryptographically secure random passwords using the Web Crypto API's crypto.getRandomValues function. This tool is commonly used by developers and security professionals who need to generate strong, complex passwords for various applications or users, solving the specific problem of weak password creation which can lead to security breaches.

It allows users to customize password length from 8 to 128 characters and choose character types such as uppercase, lowercase, numbers, and symbols, providing flexibility in generating passwords that meet specific requirements. The tool also includes a feature to exclude ambiguous characters like 0/O, 1/l/I, which can be easily confused with each other.

What makes this strong password generator different is its ability to generate multiple secure passwords at once, with options to copy them with one click, and all processing happens client-side, ensuring that no sensitive data leaves the browser. The tool's getStrength function evaluates password strength based on length and character types, providing a score that corresponds to a specific label like Weak, Fair, Good, or Strong, helping users determine how secure their generated passwords are when they generate random password online using this secure password creator.

Why Use Password Generator?

  • Uses Web Crypto API for cryptographic randomness
  • Customizable character sets and length
  • Exclude ambiguous characters
  • Generate multiple passwords
  • Zero server communication

Common Use Cases

Account Security

Unique, strong passwords for every account.

Database Credentials

Protect database connections and API keys with unique credentials.

Wi-Fi Passwords

Set up WPA2/WPA3 networks with hard-to-crack keys.

Policy Compliance

Meet organizational password requirements.

Technical Guide

Under the hood, it utilizes React state management with useState and useCallback to efficiently handle user input and password generation. The crypto.getRandomValues function from the Web Crypto API is used in conjunction with a Uint32Array to generate cryptographically secure random numbers, which are then mapped to character positions within the dynamically built pool of possible characters. This pool is constructed based on user selections for uppercase, lowercase, numbers, and symbols, allowing for customization of password length and composition. The getStrength function evaluates password strength by checking conditions such as length and presence of different character types, assigning a score that corresponds to a specific label indicating the password's security level. The strengthLabel function then maps this score to a color-coded label, providing visual feedback on the generated password's strength. When generating multiple passwords, it uses a loop to create an array of results, which are then displayed along with options to copy each password to the clipboard using navigator.clipboard.writeText. The use of crypto.getRandomValues instead of Math.random helps avoid biases that could compromise security in critical applications.

Tips & Best Practices

  • 1
    Set length to at least 12 for stronger passwords
  • 2
    Enable excludeAmbiguous to avoid similar characters
  • 3
    Use numbers and symbols to increase password complexity
  • 4
    Generate multiple passwords and compare strength labels
  • 5
    Copy generated passwords using the copy button
  • 6
    Adjust character sets by checking or unchecking options

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Frequently Asked Questions

Q How secure is this password generator?
It uses the Web Crypto API with no server transmission.
Q Are generated passwords stored anywhere?
No. Only in browser memory during the session.
Q How long should passwords be?
12+ basic, 16+ strong, 20+ critical systems.

About This Tool

Password Generator is a free online tool by FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration or installation required.