How to Use the UUID v4 & GUID Batch Generator (Bulk Export)
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1
Select how many UUIDs to generate (1, 10, 50, 100, or custom up to 1,000).
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2
Customize formatting: Uppercase / Lowercase, With / Without Hyphens, Wrapped in Braces `{}` or Quotes `""`.
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3
Click "Generate UUIDs" for instant cryptographic generation using `crypto.randomUUID()`.
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4
Click "Copy All" or download as a text file.
Practical Example & Use Case
Common Real-World Scenario
Generating 50 clean lowercase UUIDs formatted as a comma-separated array for database seeding in PostgreSQL or MongoDB.
Technical Notes & Limitations
Browser Engine Architecture
Uses `crypto.getRandomValues()` / `crypto.randomUUID()` for cryptographic entropy.
Frequently Asked Questions
What is the probability of a UUID v4 collision?
Effectively zero! With 122 bits of random entropy ($2^{122}$ or $5.3 \times 10^{36}$ possible combinations), you would need to generate 1 billion UUIDs per second for 85 years to have a 50% chance of a single collision.