About This Tool
What is UUID Generator?
A tool for generating UUIDs (Universally Unique Identifiers). UUIDs are used to create unique identifiers without collision in distributed systems. They are commonly used for database primary keys, API request IDs, and session tokens.
How to Use
- Select the UUID version (default is v4).
- Enter the number of UUIDs to generate.
- Click 'Generate' to instantly create UUIDs.
- Click on a generated UUID to copy it.
Key Features
- UUID v4 (random-based) generation
- Batch generation of multiple UUIDs at once
- One-click copy functionality
- Cryptographically secure random number generation in browser
Tips
- UUID v4 uses 122 bits of random data, making collision probability extremely low.
- Using UUIDs as database primary keys prevents ID collisions in distributed environments.
- The UUID format consists of hexadecimal digits in 8-4-4-4-12 pattern.
UUID Generator
Generate random UUID (v4)
Frequently Asked Questions
Probabilidade de colisão UUID v4?▼
Com 122 bits aleatórios, seriam necessários ~2,71 × 10^18 UUIDs para 50% de chance. Praticamente impossível.
Diferença entre versões UUID (v1, v4, v7)?▼
v1: timestamp+MAC. v4: puramente aleatório (mais popular). v7: timestamp+aleatório, ideal para chaves primárias.
UUID ou auto-increment?▼
UUID para sistemas distribuídos. Auto-increment para banco único. UUID v7 é um bom compromisso.
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