Generate UUIDs instantly
Create one or many UUID v4 values for development, testing, and integration workflows.
Settings
Generate one or multiple RFC 4122 UUID v4 values.
UUID output
Click generate to create UUIDs.
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Why this tool exists
UUID Generator helps you create unique identifiers for records, events, API resources, and distributed workflows.
This tool generates UUID v4 values locally in your browser using cryptographically secure randomness.
Common use cases
- Create temporary IDs for frontend state and optimistic UI flows.
- Generate unique primary keys for test fixtures and local datasets.
- Prepare identifiers for API payload prototypes and docs.
Example input / output
Single UUID
Input
Output
Bulk UUIDs
Input
Output
Common errors
UUID list is empty
Cause: Generate was not clicked yet or output was cleared.
Fix: Click Generate to create new UUID values.
Related guides
When to use UUIDs, how to store them, and common pitfalls in distributed systems.
Related tools
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Frequently asked questions
Which UUID version is generated?
This tool generates UUID version 4 identifiers using browser cryptographic randomness.
Can I generate multiple UUIDs at once?
Yes. You can generate UUIDs in bulk and copy them in one click.