UUID Generator

💡 About This Tool

Generate cryptographically strong Universally Unique Identifiers (UUIDs). Ideal for generating database primary keys, session tokens, or unique filenames where collision resistance is critical. Outputs standard UUID Version 4.

📘 Usage Tips

• UUID v4 (Random) Uses crypto.randomUUID() (or a secure fallback) to generate Version 4 UUIDs based on random numbers, ensuring high entropy.
• Bulk Generation Generate multiple IDs (up to 100) in a single batch. Useful for populating mock databases or test datasets.
• Format Control Toggle hyphens on/off to match your system's requirements (e.g., 32-character hex string vs standard 36-character UUID).

🧐 Frequently Asked Questions

Q. Collision Probability?

A. Theoretically non-zero, but negligible. A v4 UUID has $2^{122}$ possible combinations. The chance of collision is statistically insignificant for almost all applications.

Q. v1 vs v4?

A. v1 is time-based and includes the MAC address (privacy risk). v4 is purely random and anonymous. v4 is generally preferred for web applications.

📚 Trivia

UUIDs (Universally Unique Identifiers) allow distributed systems to generate unique IDs without a central coordination authority, solving the scalability issues of auto-incrementing integers.