UUID Generator

Generate unique identifiers (UUID/GUID) online for free. Choose between UUID v1 (time-based), v4 (random), or v7 (modern Unix-time-based). Useful for databases, API keys, distributed systems, and testing. Export results as plain text or JSON.

UUID versions supported

  • UUID v1 uses timestamp and node information, which can be useful for legacy systems that expect time-based identifiers.
  • UUID v4 is random and is the common default for fixtures, API examples, database records, and distributed applications.
  • UUID v7 is Unix-time-based and sorts better by creation time, which is useful for logs, events, and modern database indexes.

Common UUID use cases

Use generated UUIDs when preparing sample data, creating stable test identifiers, documenting API payloads, or testing systems that require globally unique values.

Privacy note: Submitted values are processed only to produce the requested result and are not stored by this tool.

Output format

Based on the ramsey/uuid library.