UUID Generator
Generate cryptographically random UUID v4 identifiers — one at a time or in bulk. Each UUID is unique across space and time, making them perfect for database primary keys, session tokens, or correlation IDs.
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About UUID Generator
## What is a UUID?
A **UUID (Universally Unique Identifier)** is a 128-bit identifier that is practically guaranteed to be unique without a central authority. The format is `xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx` where `4` indicates version 4 (random).
### UUID versions
| Version | Generation method |
|---------|-------------------|
| **v1** | Timestamp + MAC address |
| **v4** | Cryptographically random (most common) |
| **v5** | SHA-1 hash of namespace + name |
| **v7** | Timestamp-ordered random (newer, sortable) |
### When to use UUIDs
- **Database primary keys** — avoids sequential IDs that leak information
- **Distributed systems** — generate IDs without coordination between services
- **API idempotency keys** — prevent duplicate operations on retry
- **Session tokens** — unique identifiers for user sessions
### Tips
- UUID v4 has **2^122** possible values — collision probability is negligible
- If you need **sortable** IDs, consider UUID v7 or ULID instead
- UUIDs as database PKs can fragment B-tree indexes — use UUID v7 for ordered insertion
Why Use VTX Labs?
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