UUID Generator
Free online UUID v4 Generator. Create single or bulk Universally Unique Identifiers (UUIDs) using `crypto.randomUUID()`. Supports uppercase formatting, hyphen removal, and one-click bulk copying. 100% private, fast, and generated locally in your browser.
Your files never leave your device. All processing happens on your device. No uploads, ever.
How to use UUID Generator
- 1
Select Quantity
Choose how many UUIDs you want to generate (1 to 100).
- 2
Choose Options
Toggle uppercase letters or hyphen removal if needed.
- 3
Copy UUIDs
Copy individual UUIDs or click 'Copy All' to copy the complete list.
RFC 4122 Standard Compliant UUID v4
Our UUID Generator creates version-4 cryptographically pseudo-random UUIDs conforming strictly to RFC 4122. Each 128-bit identifier guarantees maximum uniqueness across distributed systems.
Bulk Generation & Instant Copying
Generate up to 100 UUIDs at once. Custom formatting toggles allow uppercase characters or removing hyphens for clean database keys.
Frequently asked questions
What is a UUID v4?
A UUID (Universally Unique Identifier) version 4 is a 128-bit value formatted as 32 hexadecimal digits separated by hyphens (e.g., 123e4567-e89b-42d3-a456-426614174000).
What is the probability of a UUID collision?
The collision probability of UUID v4 is negligible. You would need to generate tens of trillions of UUIDs to have a 1-in-a-billion chance of collision.
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Last updated 10 August 2026