How to Use the GUID & UUID v4/v5 Generator
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1
Select UUID Version: Version 4 (Cryptographically random) or Version 5 (Namespace-based SHA-1).
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2
Set how many GUIDs to generate (1 to 500).
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3
Toggle formatting options: Uppercase, Braces `{...}`, or remove Hyphens.
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4
Click "Generate" and copy the entire batch with one click.
Practical Example & Use Case
Common Real-World Scenario
Generating unique database primary keys (UUIDs) for seeding distributed SQL tables or Microsoft .NET GUIDs.
Technical Notes & Limitations
Browser Engine Architecture
UUID v4 utilizes `crypto.getRandomValues()` ensuring 122 bits of cryptographic entropy.
Frequently Asked Questions
What is the probability of a UUID v4 collision?
Virtually zero. You would need to generate over 1 billion UUIDs per second for 100 years to have a 50% chance of a single collision.