UUID Generator
Generate random UUID v4 identifiers instantly.
相关工具
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit value commonly used as a unique key in databases, APIs, and distributed systems. Version 4 UUIDs are generated from random numbers.
This tool uses your browser's crypto.randomUUID() API to produce RFC 4122-compliant v4 UUIDs.
How to Use This Tool
Choose how many UUIDs you want to generate.
Click Generate to create new random UUIDs.
Copy a single UUID or copy the full list.
Common Uses
- Primary keys for prototypes and seed data
- Correlation IDs for logs and tracing
- Test fixtures for APIs and databases
- Session or request identifiers in development
常见问题
Are these UUIDs truly unique?
UUID v4 values are statistically unique for practical purposes. Collisions are astronomically unlikely for normal application use.
Which UUID version does this generate?
This tool generates UUID version 4 (random) identifiers.
Is this tool free?
Yes. This tool is completely free to use with no sign-up, no limits, and no hidden fees.
Does my data leave my browser?
No. All processing happens entirely in your browser using client-side JavaScript. Your data is never sent to a server or stored anywhere.
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