Password Generator
Generate strong, random passwords with configurable length, character sets, and strength indicator.
XV!;<hNrujtQVE>nUse this as an API
Automate this in your app with a single POST request. Free tier included.
Use this in your AI agent
Connect via MCP and let Claude, Cursor, or VS Code call this tool natively.
Why random passwords matter
Dictionary attacks and credential stuffing exploit predictable passwords. Attackers test billions of common passwords, dictionary words, and known breach patterns. A random 16-character password with mixed character types resists brute-force attacks even with modern GPU clusters. Every account should use a unique, randomly generated password.
Length vs complexity
Adding one character to a password multiplies the possible combinations by the size of the character set. A 20-character lowercase password (26^20) has more entropy than an 8-character password using all character types (95^8). When a system allows long passwords, prioritize length. When length is capped, maximize character diversity.
Cryptographic randomness
This tool uses crypto.getRandomValues() from the Web Crypto API for password
generation. Unlike Math.random(), which uses a predictable pseudorandom number
generator, crypto.getRandomValues() pulls from the operating system's entropy
pool. This is the same source of randomness that secures TLS handshakes. For related
security operations, our Hash Generator uses the same
Web Crypto API for hash computation.
Password storage best practices
Never store passwords in plain text. Applications should hash passwords using bcrypt, scrypt, or Argon2 with a unique salt per user. These algorithms are intentionally slow to resist brute-force attacks. If you need to inspect tokens generated from passwords, use our JWT Decoder to examine the payload.
Frequently Asked Questions
- How random are these passwords?
- This tool uses the Web Crypto API's
crypto.getRandomValues(), which provides cryptographically secure random numbers. The same API secures HTTPS connections and is suitable for generating passwords, tokens, and keys. - What makes a password strong?
- Password strength comes from length and character diversity. A 16-character password using uppercase, lowercase, numbers, and symbols has roughly 10^30 possible combinations. Length matters more than complexity: a 20-character lowercase-only password is stronger than an 8-character password with all character types.
- Is my password sent to a server?
- No. Password generation runs entirely in your browser. Nothing is transmitted or stored.
- Should I use a password manager instead?
- A password manager generates, stores, and fills passwords for you. This tool is useful for one-off generation, creating passwords for systems that don't integrate with your manager, or when you need passwords in bulk.