UUID Generator

Generate v4 UUIDs in bulk for databases, APIs and distributed systems.

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The short answer

A v4 UUID like 550e8400-e29b-41d4-a716-446655440000 is randomly generated with 122 bits of entropy — collisions are so unlikely you can treat them as unique across all systems, forever. That’s why databases use them as distributed IDs.

How to use the uuid generator

  1. Choose how many you need.
  2. Generate.
  3. Copy one or all.

UUID Generator — FAQs

What is a UUID?

A 128-bit Universally Unique Identifier, written as 32 hex digits in 5 groups (8-4-4-4-12). v4 means randomly generated.

UUID vs auto-increment ID?

Auto-increment IDs leak count info and clash across databases; UUIDs are globally unique without coordination — ideal for distributed systems.

Can two UUIDs collide?

Theoretically yes; practically never. You’d need to generate ~2.7 quintillion UUIDs for a 50% collision chance.

Should I store UUIDs as strings?

In databases, store as binary(16) — it’s faster and half the size of the 36-char string form.

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