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🆔 UUID Generator

Generate UUID v1 (timestamp-based) and v4 (random) with bulk generation support

UUID v4
Random, no collision risk
UUID v1
Timestamp + MAC address

Understanding UUIDs

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit value used to uniquely identify information in computer systems. UUIDs are standardized by RFC 4122 and are designed to be unique across time and space without requiring a central coordinating authority.

UUID Versions Explained

UUID v4 generates completely random identifiers and is recommended for most use cases due to better privacy and unpredictability. UUID v1 combines timestamp and MAC address information, which can reveal when and where the UUID was generated but provides temporal ordering.

Common Use Cases

UUIDs are commonly used as database primary keys, distributed system identifiers, session tokens, file names, and any scenario requiring unique identifiers without central coordination. They're especially useful in microservices and distributed databases.

How to Use This Tool

  1. Select the UUID version: v4 (random, recommended for most cases) or v1 (timestamp-based)
  2. Enter the number of UUIDs to generate (1-100) if you need multiple identifiers
  3. Click "Generate UUIDs" to create your unique identifiers
  4. Review the generated UUIDs in the output area - each UUID appears on a separate line
  5. Click "Copy All" to copy all generated UUIDs to your clipboard for use in your project

Frequently Asked Questions

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit value used to uniquely identify information in computer systems. UUIDs are standardized by RFC 4122 and are designed to be unique across time and space without requiring a central registry.

What's the difference between UUID v1 and v4?

UUID v4 uses random numbers and is recommended for most use cases due to better privacy and unpredictability. UUID v1 is based on timestamp and MAC address, which can reveal information about when and where the UUID was generated.

Are UUIDs truly unique?

While the probability of generating duplicate UUIDs is extremely low (near zero for v4), they are not mathematically guaranteed to be unique. However, for practical purposes, UUIDs can be considered unique.

Is this tool free to use?

Yes, this UUID generator is completely free to use with no registration, limits, or restrictions.

Does this work on mobile devices?

Yes, this tool is fully responsive and works on all mobile devices, tablets, and desktop computers.