UUID Generator
Genera UUIDs (Universally Unique Identifiers) online. Crea IDs únicos basados en timestamp y ordenables para sistemas distribuidos y bases de datos. Tool generador de UUID gratis.
Include Commas
As JSON
Cómo usar esta UUID Generator
- Select the UUID version you want to generate (v1, v4, v7, or nil).
- Click the Generate button to create a new UUID.
- Use the copy button to copy the UUID to your clipboard.
- Generate multiple UUIDs by clicking the button repeatedly or using batch generation.
What's a UUID?
A Universally Unique Identifier (UUID) is a 128-bit number used to identify information in computer systems. The number of possible UUIDs is 16^32, which is 2^128 or about 3.4x10^38 (which is a lot!).
Features
- Generate UUID v1 (timestamp-based) for time-ordered identifiers
- Generate UUID v4 (random) for general-purpose unique IDs
- Generate UUID v7 (Unix timestamp-based) for sortable, modern identifiers
- Generate nil UUIDs (all zeros) for placeholder values
- One-click copy to clipboard
- Instant generation with no server requests
Use Cases
- Database primary keys that avoid collisions across distributed systems
- Session identifiers for web applications
- Unique filenames for uploaded content
- Correlation IDs for distributed tracing and logging
- API request identifiers for idempotency
Preguntas Frecuentes
What is the difference between UUID v4 and v7?
UUID v4 is fully random, while UUID v7 embeds a Unix timestamp in the first 48 bits. This makes v7 UUIDs naturally sortable by creation time, which improves database index performance.
Can two UUIDs ever be the same?
Theoretically yes, but the probability is astronomically small. With UUID v4, you would need to generate about 2.71 quintillion UUIDs to have a 50% chance of a single collision.
Which UUID version should I use?
Use UUID v4 for general-purpose unique identifiers. Use UUID v7 if you need time-sortable IDs, such as database primary keys. UUID v1 is less common today due to privacy concerns with exposing MAC addresses.