UUID Generator

Generate UUIDs (v4 and v7) instantly. Bulk generate up to 100 UUIDs and copy them all at once.

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How to Use This Tool

Select UUID version (v4 for random, v7 for time-ordered), choose how many to generate (up to 100), and click Generate. Each UUID is displayed individually and can be copied. Use 'Copy All' to copy all generated UUIDs at once, one per line.

Common Use Cases

  • Generating unique identifiers for database records
  • Creating correlation IDs for distributed tracing
  • Generating unique filenames for uploaded assets
  • Testing APIs that require UUID parameters

Frequently Asked Questions

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit identifier that is unique across space and time. It is commonly used as a primary key in databases and as an identifier in distributed systems.

What is the difference between UUID v4 and v7?

UUID v4 is randomly generated and has no inherent ordering. UUID v7 is time-ordered, embedding a Unix timestamp in the first 48 bits, making it ideal for database primary keys because it maintains insertion order.

Are UUIDs truly unique?

While theoretically not guaranteed to be unique, the probability of a UUID v4 collision is astronomically low — about 1 in 2^122. For practical purposes, they are considered unique.