Peregrine falcon logoPeregrine Dev

Password Generator — Generate Secure Passwords Free

Generate cryptographically secure random passwords with customizable length, character sets, and bulk generation. Instantly. No sign-up required.

16
8128
StrengthVery Strong

Estimated crack time: 5.9e+10 millennia

Bulk Generate

Generate a hash?

Create MD5, SHA-1, or SHA-256 hashes from any input

How to password generator

  1. 1.Set the desired password length using the slider (8-128 characters)
  2. 2.Choose which character sets to include: uppercase, lowercase, numbers, and symbols
  3. 3.Click 'Generate Password' to create a cryptographically random password
  4. 4.Click 'Copy' to copy the password to your clipboard, or use bulk generate for multiple passwords at once

About This Tool

A password generator creates random, hard-to-guess passwords using cryptographically secure randomness. Strong passwords are essential for protecting online accounts, API keys, database credentials, and any system where unauthorized access must be prevented. This tool uses the browser's native crypto.getRandomValues() API to ensure every character is chosen with true randomness.

You can customize every aspect of the generated passwords: set the length from 8 to 128 characters, toggle uppercase letters, lowercase letters, numbers, and symbols on or off, and see a real-time strength indicator showing estimated security level. The strength meter calculates entropy based on your selected character pool and password length, giving you immediate feedback on how resistant your password is to brute-force attacks.

Need multiple passwords at once? The bulk generation feature lets you create up to 50 passwords in a single click, perfect for provisioning accounts, generating API tokens, or seeding test environments. All generation happens locally in your browser — no passwords are ever sent to a server or stored anywhere, ensuring complete privacy.

Frequently Asked Questions

Passwords are generated using crypto.getRandomValues(), the browser's cryptographically secure random number generator (CSPRNG). This is the same source of randomness used in TLS, SSH key generation, and other security-critical applications. No server is involved — everything happens locally in your browser.

For most accounts, 16 characters or more is recommended. A 16-character password using all character sets (uppercase, lowercase, numbers, symbols) has roughly 105 bits of entropy, making it infeasible to brute-force with current technology. For high-security applications, consider 20+ characters.

Entropy measures the unpredictability of a password in bits. It is calculated as length multiplied by log2(pool size), where pool size is the number of possible characters. Higher entropy means more possible combinations. A password with 80+ bits of entropy is generally considered strong against offline attacks.

Yes, when possible. Including symbols increases the character pool from 62 (letters + digits) to 92+, significantly raising entropy per character. However, some systems restrict which characters are allowed. If a service rejects symbols, a longer password using letters and numbers can achieve equivalent security.

No. All password generation happens entirely in your browser using JavaScript. No passwords are transmitted to any server, logged, or stored. You can verify this by using the tool offline or inspecting network traffic in your browser's developer tools.

Related Tools

Hash GeneratorUUID GeneratorBase64 Encode/Decode