UUID Generator

Generate UUID v4 and UUID v7 in bulk online

Settings

Tip: v4 is ideal for test data; v7 is time-ordered and recommended for database primary keys.

Result

UUID Generator

Generate UUID v4 and UUID v7 in bulk online. All operations run locally in your browser — no data is sent to servers for maximum privacy.

Features

UUID Version Differences

UUID v4 Fully random without embedded timestamps. Great for development debugging and mock test data. Not recommended as primary keys for large database tables due to unordered distribution.

UUID v7 Contains a millisecond timestamp prefix. Generated IDs are time-sorted. This reduces index fragmentation when stored in databases, making it perfect for business primary keys, order IDs and log identifiers.

Export Format Guide

  1. TXT: One UUID per line, easy to use with scripts and plain text editors
  2. JSON Array: ["uuid1","uuid2"] — ideal for frontend development and API mock data
  3. JSON Object: {"ids":["uuid1","uuid2"]} — matches standard backend request structures

All UUIDs are generated locally inside your browser. No data leaves your device.

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