UUID Generator
Generate one or many UUID v4 values instantly in the browser.
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Frequently asked questions
Which UUID version is produced, and how many at once?
Random version 4 identifiers, up to 100 per run. They come from the browser's crypto UUID call, with a hand-rolled version-4 builder on the same secure random source as a backup.
Can two people ever get the same one?
Version 4 draws 122 random bits, so a practical collision is not something you plan around. Each value is generated in your browser and nothing is recorded, so we cannot look it up later either.