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Random Password Generator

Generate truly random passwords with cryptographic security

Strength
Length: 20

Generated in your browser and not uploaded to our servers during creation.

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True randomness is what separates a secure password from a vulnerable one. Humans are terrible at creating random passwords -- we gravitate toward patterns, favorite numbers, keyboard walks like "qwerty," and predictable substitutions like "p@ssw0rd." Attackers know these habits and exploit them with dictionary attacks and rule-based cracking. A genuinely random password eliminates all of these weaknesses because there is no pattern to exploit.

Coda One's Random Password Generator uses the Web Crypto API to produce passwords with cryptographic-grade randomness. Each character is selected independently from your chosen character set with uniform probability -- no bias, no patterns, no predictability. You control the length (8 to 64 characters) and which character types to include: uppercase letters, lowercase letters, numbers, and symbols. The entropy meter updates in real time so you can see exactly how random and secure your password is.

Every password is generated entirely in your browser. No data is transmitted to any server. No passwords are stored, logged, or tracked. You can generate hundreds of random passwords in a session without any rate limits or account requirements. Use this tool whenever you need a password you can trust -- for new accounts, password rotation, API keys, or any security-sensitive credential.

Frequently Asked Questions

How is this different from "random" passwords I make up myself?
Human-created "random" passwords follow subconscious patterns that cracking tools exploit. Studies show people favor certain letters, avoid symbols, and create predictable structures. Our generator uses cryptographic randomness where every character is truly independent -- no human bias, no exploitable patterns.
What is the Web Crypto API?
The Web Crypto API is a browser-native interface for cryptographic operations. It provides access to your operating system's cryptographically secure random number generator (CSPRNG). This is the same randomness source used for TLS/SSL encryption, making it suitable for generating security-critical passwords.
How many characters should my random password be?
For most accounts, 16 characters with all character types is excellent. For high-security accounts (banking, email, password manager master password), use 20 or more characters. Our default of 20 characters provides over 130 bits of entropy -- far beyond what any attacker can brute-force.
Can I exclude ambiguous characters like 0/O and 1/l?
Currently the generator uses the full character set to maximize randomness. If you need to type a password manually, generate one and replace any ambiguous characters. The small entropy reduction from excluding a few characters is usually modest at 16+ character lengths.
Is there a limit to how many passwords I can generate?
The page is designed for direct browser use, so the practical limit is your browser and device performance rather than a separate account gate. You can keep generating new passwords as needed from the same page.

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