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UUID generator

Generate random version 4 UUIDs on your device, with batch count, hyphen, uppercase, copy, and download controls.

Random UUIDs, ready to use

xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx

Version 4 · 122 random bits · generated only when you choose Generate UUIDs.

Processed on your device

How it works & useful details

How to use this tool

Choose a count and format, then generate fresh UUIDs. Copy or download the newline-separated output.

Details and limits

Version 4 UUIDs use 122 random bits from Web Crypto; the version and variant bits are set explicitly. Generate 1–100 at a time. Hyphen-free output is a compact representation of the same identifier.

Nothing is generated on page load. UUIDs are identifiers, not a claim of guaranteed uniqueness or authentication credentials.