UUID Generator
Generate random version 4 UUIDs for development, testing, or database keys.
About This Tool
This tool generates version 4 UUIDs (universally unique identifiers) using your browser's built-in crypto.randomUUID function, which follows the standard UUID v4 format used across databases and APIs.
How It Works
- Set how many UUIDs you need.
- Choose whether to uppercase them or remove hyphens.
- Click Generate UUIDs.
- Copy a single UUID or use Copy All to grab the whole batch.
What This Tool Covers
- Standard version 4 (random) UUIDs
- Batch generation up to 50 at once
- Optional uppercase formatting
- Optional hyphen removal for compact IDs
Frequently Asked Questions
What is a UUID used for?
UUIDs are commonly used as unique identifiers for database records, API resources, and distributed systems where IDs need to be generated without a central counter.
Is a UUID v4 guaranteed to be unique?
The chance of a collision is astronomically small in practice, which is why UUID v4 is widely trusted for unique identifiers.
Can I remove the hyphens?
Yes, toggle off "Include hyphens" to get a 32-character compact form.
Does this tool log the UUIDs I generate?
No, everything is generated locally in your browser and nothing is sent to a server.
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