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UUIDs
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📘 About the UUID Generator
A UUID (also called a GUID) is a 128-bit identifier like 3f2b8c1e-9a4d-4f6b-8e2a-5c7d1b0e9f34 that is practically guaranteed to be unique. Generate one or thousands for database keys, test data and software.
Version 4 is fully random; version 7 starts with the current time, so new IDs sort in order — better for database indexes.
💡 How to use the UUID Generator
Choose how many and the version.
Choose uppercase, no hyphens or braces if needed.
Click Generate and copy.
❓ Frequently asked questions
Can two UUIDs ever be the same?
In practice, no: there are 2¹²² possible random v4 UUIDs, so the chance of a repeat is vanishingly small.