UUID Generator
Generate single or bulk cryptographically secure UUID v4 (Random) or UUID v1 (Time-based) identifiers.
How to Use UUID Generator
- Choose your UUID version (UUID v4 is standard random; UUID v1 is time-based).
- Enter the number of UUIDs you wish to generate (from 1 up to 100 codes in bulk).
- Toggle formatting options: choose whether to output them in UPPERCASE or remove the standard hyphens.
- Click the 'Generate UUIDs' button to build the list in real-time.
- Click 'Copy All UUIDs' to copy the entire generated list (one per line) or use 'Copy' on single values.
Key Features & Privacy Guarantee
- Cryptographically Secure: Uses browser-level secure random number generation APIs (`crypto.getRandomValues`) for UUID v4.
- Bulk Generation: Save time by generating up to 100 UUIDs in a single click.
- Custom Format Options: Instantly strip hyphens or toggle uppercase letters depending on database key guidelines.
- Standard Compliant: Generates valid v4 and v1 UUIDs following the official RFC 4122 specification.
Frequently Asked Questions
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit label used for information in computer systems. When generated according to standard methods, UUIDs are practically unique without requiring a central registry or coordination, making them ideal for database keys, transactions, and unique file naming.
What is the difference between UUID v1 and UUID v4?
UUID v1 is time-based, generated by combining the host computer's timestamp and random node sequence. UUID v4 is completely random, generated using cryptographically strong pseudo-random numbers. UUID v4 is much more popular as it does not leak any creation timestamps.
Are these UUIDs guaranteed to be unique?
Yes, practically. For UUID v4, the total number of possible combinations is 2^122 (approx 5.3 x 10^36). The probability of generating a duplicate is so infinitesimally small that you would need to generate billions of UUIDs per second for hundreds of years to have a slight chance of a collision.
Is this tool safe for generating production keys?
Yes. Our generator executes client-side inside your browser context using standard Web Cryptography APIs, which hook directly into your operating system's secure entropy sources. No keys are sent over the network, ensuring complete confidentiality.