UUID Generator
Generate v4 UUIDs online — bulk generation up to 1000 at once, instant copy to clipboard, RFC 4122 compliant. Uses crypto.randomUUID, runs in your browser.
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How to Use UUID Generator
- 1Click "Generate" to create a new random UUID v4.
- 2Set the quantity to generate multiple UUIDs at once.
- 3Click "Copy" to copy the generated UUIDs to your clipboard.
Frequently Asked Questions
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit identifier standardised by RFC 4122. UUIDs are used to uniquely identify resources in distributed systems without requiring a central authority.
What is UUID v4?
UUID v4 is a randomly generated UUID. Six bits are fixed to indicate the version and variant, and the remaining 122 bits are randomly generated, giving roughly 5.3 × 10^36 possible values.
Are UUIDs truly unique?
UUID v4 values are not guaranteed to be unique, but the probability of a collision is astronomically low — you would need to generate about 2.71 quintillion UUIDs to have a 50% chance of a single duplicate.
Is this generated locally?
Yes. UUIDs are generated entirely in your browser using the Web Crypto API. No data is sent to any server.
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