UUID Generator
Generate cryptographically secure UUID v4 identifiers. Batch generate.
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What is this tool?
UUID (Universally Unique Identifier) generator creates random version 4 UUIDs following the RFC 4122 standard. Each UUID is a 36-character string (8-4-4-4-12 format with hyphens) containing 122 random bits. Generate single or batch UUIDs. Also supports v1 (time-based) and v7 (time-ordered) UUIDs. Copy individual or all at once.
How to use
- 1
Select version
Choose UUID version (v4 recommended for most uses).
- 2
Generate
Click to generate one or multiple UUIDs.
- 3
Copy
Copy individual UUIDs or all at once.
Frequently Asked Questions
What is a UUID?
UUID is a 128-bit identifier that is practically unique across all systems and time. Version 4 UUIDs are randomly generated with such low collision probability that you can generate a billion UUIDs per second for a century with negligible risk of duplication. Widely used for database keys, session IDs, and distributed systems.
Can UUIDs be predicted?
UUID v4 is random and unguessable.
Can I use this in production?
This tool is designed for development and testing. For production use established libraries with security audits.