UUID Generator
Generate Universally Unique Identifiers (UUIDs) instantly. Perfect for database keys, session IDs, file names, and distributed systems. All generation happens in your browser.
Frequently Asked Questions
Is this UUID generator free to use?
Yes! Our UUID generator is completely free with unlimited usage, no registration required, and no hidden fees.
What is the difference between UUID v1 and v4?
UUID v1 is timestamp-based and includes MAC address information, making it sortable but potentially traceable. UUID v4 is randomly generated, providing better privacy and is the most commonly used version.
Are the generated UUIDs truly unique?
Yes! The probability of generating duplicate UUIDs is astronomically low (approximately 1 in 5.3×10³⁶ for v4). They are statistically guaranteed to be unique for practical purposes.
Can I use these UUIDs in production applications?
Absolutely! UUIDs are industry-standard identifiers used in databases, APIs, file systems, and distributed systems worldwide. They are production-ready and widely supported.
What UUID format should I use?
The standard hyphenated lowercase format (e.g., "550e8400-e29b-41d4-a716-446655440000") is most common and widely supported. Use compact format for space-constrained systems or uppercase for specific API requirements.