UUID / ULID Generator

This tool generates universally unique identifiers using standard UUID and ULID algorithms.

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About the types

  • UUID v4: Standard 128-bit random ID, generated by crypto.randomUUID(). Formatted as xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx.
  • ULID: Universally Unique Lexicographically Sortable Identifier. 26-character Base32 Crockford encoded string, starts with a timestamp, allowing for sortable and more entropy-rich IDs.
  • UUID v7: (experimental) Timestamp-based, sortable universally unique identifier. Does not strictly follow the official RFC but provides a modern, time-ordered format.

How it works

Identifiers are generated using cryptographically secure random values provided by the browser.

Common use cases

Commonly used for database keys, object identifiers, and distributed systems.

Limitations

Generated IDs are random and do not carry semantic meaning.

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