UUID Generator
Generate universally unique identifiers (UUIDs). Supports version 4 (random) and version 7 (time-ordered, sortable). Generate single or bulk UUIDs for database primary keys, distributed systems, or any context where you need globally unique identifiers without coordination.
What this tool checks
- UUID v4 (random) generation
- UUID v7 (time-sorted) generation
- Bulk generation (up to 100 at once)
Automate this with the API
Run this tool programmatically from your code. Get a free temporary API key with 200 requests — or register for unlimited access.
curl https://apixies.io/api/v1/uuid?count=... \
-H "X-API-Key: YOUR_API_KEY"
Frequently asked questions
What's the difference between UUID v4 and v7?
UUID v4 is fully random. UUID v7 embeds a timestamp in the first 48 bits, making them naturally sortable by creation time. v7 is better for database primary keys because sorted inserts are much faster for B-tree indexes.
Can two UUIDs ever collide?
In theory, yes. In practice, effectively never. A v4 UUID has 122 random bits, giving 5.3 x 10^36 possible values. You'd need to generate about a billion UUIDs per second for 85 years to have a 50% chance of a single collision.
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