Security
Password Generator for Testing & Development
Generate realistic test passwords for development and QA. Configurable length and character sets. Browser-based, no data stored. Free, no signup.
About this password generator for testing & development
When building or testing authentication systems, the passwords you use in your test data matter more than most developers realize. Using "password", "test123", or "admin" in test accounts creates two problems: it trains muscle memory for weak passwords, and it risks those credentials leaking into production via database seeds or exported fixtures. A realistic test password — 12-16 characters with mixed types — also validates that your input fields, password strength meters, and hashing functions handle real-world values correctly. Truncation bugs, encoding issues with special characters, and bcrypt length limits (72 bytes) are all easier to catch with realistic passwords. This generator lets you configure exactly the character set and length you need for your test scenarios, from simple alphanumeric passwords to full-complexity strings that stress-test your validation logic.
FAQ
Common questions
What password length should I use for test data?
Match what real users will create — 12-20 characters covers the realistic range. Also test edge cases: the minimum allowed length (usually 8), the maximum (often 64 or 128), and lengths that would exceed bcrypt's 72-byte limit.
Should test passwords include special characters?
Yes — special characters expose encoding bugs, escaping issues in SQL/HTML, and validation logic errors. Test with characters like !@#$%^&* and also with edge cases like quotes and backslashes.
Can I use the same test password across environments?
Use different passwords for development, staging, and production test accounts. Never seed a production database with the same credentials used in development.
What is bcrypt's 72-byte password limit?
bcrypt truncates input at 72 bytes. This means passwords longer than ~72 ASCII characters are silently treated as identical after that point. If your app uses bcrypt, test this boundary explicitly.
How do I generate bulk test passwords?
Click the generator multiple times, or use the copy button for each. For programmatic bulk generation, use crypto.randomUUID() for simple tokens or the Web Crypto API's getRandomValues() for full password generation in Node.js or the browser.
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