Free Online UUID Generator

Generate secure v4 UUIDs instantly.

Your UUIDs will appear here

About the UUID Generator

This free online UUID generator creates UUIDs (Universally Unique Identifiers), also known as GUIDs (Globally Unique Identifiers) — 128-bit identifiers used to uniquely identify information in computer systems. UUIDs are standardized by RFC 4122 and are widely used in databases, distributed systems, and software development to ensure that each record or entity has a unique key without requiring a central authority.


Our UUID Generator creates version 4 UUIDs, which are generated using cryptographically secure random numbers via the browser's crypto.getRandomValues() API. This means each UUID is generated locally on your device with high entropy, making collisions virtually impossible. You can generate up to 100 UUIDs at once and copy them all to your clipboard instantly.

How to Generate UUIDs

  1. Set Quantity: Choose how many UUIDs to generate (1 to 100).
  2. Generate: Click "Generate UUIDs" to create new unique identifiers.
  3. Copy: Click "Copy All" to copy the results to your clipboard.

Common Uses for UUIDs

  • Database Keys: Primary keys for rows in SQL and NoSQL databases.
  • API Tokens: Unique identifiers for sessions, requests, and transactions.
  • File Naming: Generate unique filenames to avoid collisions in storage systems.
  • Distributed Systems: Ensure uniqueness across multiple servers without coordination.