UUID Generator

UUID Generator — Universally Unique IDs

Generate RFC 4122 compliant UUIDs (v4). Guaranteed unique identifiers for databases, APIs, and distributed systems.

Privacy: Processing happens in your browser. Files and text are not uploaded to Anwita Digital servers.

How to use this tool

  1. Click Generate to create UUID(s)
  2. Choose quantity if generating multiple UUIDs
  3. Copy individual UUIDs with one click
  4. Or export batch as plain text, JSON, or CSV
  5. Use in database primary keys, API tokens, session IDs, or distributed system identifiers

About UUID Generator

UUIDs (Universally Unique IDentifiers) are 128-bit identifiers practically guaranteed to be unique globally. Version 4 UUIDs use cryptographically secure random generation, making collision (duplicate IDs) astronomically unlikely even across distributed systems.

The generator uses browser's crypto.getRandomValues() to create RFC 4122 compliant v4 UUIDs formatted as 8-4-4-4-12 hex characters (e.g., "550e8400-e29b-41d4-a716-446655440000"). These are standard across programming languages and databases.

Use cases: database primary keys (avoids auto-increment coordination in distributed systems), session identifiers, file/object identifiers, transaction IDs, or any scenario requiring globally unique IDs without central coordination.

Frequently asked questions

Astronomically low. The probability of generating a duplicate v4 UUID is about 1 in 2^122, or roughly 5.3 × 10^36. You'd need to generate billions per second for millennia to see a collision.

Yes, though there are tradeoffs. UUIDs enable distributed ID generation without coordination, but they're larger (128 bits vs 32/64-bit integers) and non-sequential (worse for database index locality). Many systems use UUIDs successfully.

v1 uses timestamp + MAC address (can leak info), v3/v5 are name-based (deterministic), v4 is random (most common). This tool generates v4, the standard for unpredictable unique IDs.

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