UUID Generator
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? Frequently Asked Questions
What is a UUID?
UUID (Universally Unique Identifier) is a 128-bit number represented as 36 characters (32 hex + 4 hyphens): 550e8400-e29b-41d4-a716-446655440000. It's designed to be globally unique without coordination.
What UUID versions are available?
Common versions: UUIDv1 (time-based with MAC address), UUIDv4 (random, most common), and UUIDv5 (name-based with SHA-1). v4 is recommended for most uses due to simplicity and good uniqueness.
How unique are UUIDs really?
UUIDv4 has 2^122 possible values (5.3×10^36). The collision probability is so low that you could generate a billion UUIDs per second for 100 years and still have near-zero collision chance.
Where should I use UUIDs?
UUIDs are perfect for database primary keys, API request IDs, session tokens, file names, distributed systems, and any scenario where you need unique identifiers without a central coordination system.
Can I generate multiple UUIDs at once?
Yes! Most UUID generators allow batch generation of hundreds or thousands of UUIDs at once. You can export them as lists, CSV, or JSON for bulk imports into databases or applications.
Is my data safe and secure?
Yes, absolutely! This tool runs entirely in your browser. All data processing happens locally on your device - nothing is uploaded to our servers. Your files and data never leave your computer, ensuring complete privacy and security.