Password Generator
Generate secure, random passwords with customizable length and character options
Security Information
🔒 100% Client-Side: All passwords are generated locally in your browser using the Web Crypto API. No data is ever sent to our servers.
🎲 Cryptographically Secure: We use crypto.getRandomValues() for true random number generation.
💡 Tip: Use passwords with at least 16 characters and all character types for maximum security.
Deep Dive: Secure Password Generator
Humans instinctively create patterns—'Summer2024!', 'Fluffy123'—which significantly reduces password security. This generator uses crypto.getRandomValues(), a CSPRNG (Cryptographically Secure Pseudo-Random Number Generator) seeded from your device's entropy pools (hardware noise, timing jitter). The result is a mathematically unpredictable sequence that resists pattern attacks, dictionary attacks, and machine learning predictions. It operates entirely in your browser; your generated passwords never travel over the network.
Related Articles
Learn more about this tool and related topics in our blog.
Password Security Specifications: Entropy & Resistance Analysis
Technical analysis of credential strength. Computational cost of brute force attacks vs entropy bits. Implementation requirements for secure authentication systems.
Client-Side Processing for Secure, Private Web Applications
Unlock unparalleled data privacy with Filemint. Discover how our "Offline First" approach processes your sensitive files directly in your browser, ensuring they never leave your device. Experience true security and peace of mind.
Privacy Architecture
This tool uses client-side WebAssembly to ensure your data never touches a server. Secure, fast, and 100% private by design.
Core Capabilities
- Cryptographically secure randomness (CSPRNG)
- Customizable length (4-128 characters)
- Toggle Uppercase, Lowercase, Numbers, Symbols
- Exclude ambiguous characters (I vs l, 0 vs O)
- Visual strength meter calculating entropy bits
- Bulk generation for initializing multiple accounts
- One-click copy to clipboard
- 100% Client-side privacy (no server storage)
Why It Matters
- Maximum Entropy: Eliminates human bias and predictable patterns.
- Zero-Knowledge: Passwords exist only in your browser memory.
- Compliance: Meet strict corporate password policies with custom settings.
- Convenience: Generate batch passwords for testing or admin tasks.
- Speed: Instant generation with no server latency.
Quick Start Guide
Select your desired password length (recommend 16+ for sensitive accounts).
Choose character types: Uppercase, Lowercase, Numbers, Symbols.
Check 'Avoid Ambiguous' if you plan to type the password manually.
Click 'Generate' to create a new unique password.
Use the 'Copy' button or click the password to save it.
Usage Examples
Strong Personal Password
Scenario 0116 characters, all types, high entropy
Length: 16, All Checkboxes On
xK9#mP2$vL5@nQ8z
Readable / Typing Friendly
Scenario 02Avoids I, l, 1, 0, O
Option: 'Avoid Ambiguous Characters'
K9mP2vL5nQ8z
PIN Code
Scenario 03Numbers only
Length: 6, Only Numbers checked
839204
Common Scenarios
New Account Registration
Create a unique, strong password for a new service.
Wi-Fi Security
Secure your home network.
Database Credentials
Generate secrets for config files.
Questions?
Technical Architecture
Entropy & Math
**Entropy = log₂(charset^length)** - **8 chars (lowercase only)**: 26⁸ ≈ 2³⁷ bits (Weak - crackable in hours) - **12 chars (alphanumeric)**: 62¹² ≈ 2⁷¹ bits (Strong) - **16 chars (all symbols)**: 95¹⁶ ≈ 2¹⁰⁵ bits (Unbreakable) Every character added exponentially increases difficulty. A 16-character password is not twice as hard to crack as an 8-character one; it is 6,000,000,000,000,000 times harder.
CSPRNG vs Math.random()
**Math.random()** is a PRNG (Pseudo-Random Number Generator). It's fast but deterministic; if you know the seed state, you can predict future numbers. **crypto.getRandomValues()** is a CSPRNG. It pulls entropy from unpredictable system events (mouse movements, thermal noise). It is designed specifically for security. We **only** use the latter.
Attack Vectors
**Brute Force**: Trying every combination. Defeated by Length. **Dictionary Attack**: Trying words. Defeated by Randomness. **Credential Stuffing**: Reusing old passwords. Defeated by Uniqueness (generating a fresh password for every site).
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Related Articles
Learn more about this tool and related topics in our blog.
Password Security Specifications: Entropy & Resistance Analysis
Technical analysis of credential strength. Computational cost of brute force attacks vs entropy bits. Implementation requirements for secure authentication systems.
Client-Side Processing for Secure, Private Web Applications
Unlock unparalleled data privacy with Filemint. Discover how our "Offline First" approach processes your sensitive files directly in your browser, ensuring they never leave your device. Experience true security and peace of mind.