UUID Generator

About this tool

UUID (Universally Unique Identifier) is a 128-bit identifier standardized in RFC 4122. Its format is xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx - 32 hexadecimal characters separated into 8-4-4-4-12 groups. UUIDv4, which this tool generates, uses a cryptographically secure random number generator, so the probability of two UUIDs colliding is practically zero, lower than 1 in 10^36. UUIDs are used as primary keys in distributed databases, because they do not require central ID coordination, as session identifiers, transaction identifiers, or entity IDs in microservice architectures. The tool offers three modes: Single for one UUID with instant copy, Batch for 1-1000 UUIDs at once with each on its own line, and Validate to verify UUID format and detect the version.

How to use

1. 1Choose a mode with the tab: Single UUID for one generation, Batch for multiple at once, or Validate for verification.
2. 2In Single UUID mode, click Generate UUID - the UUID appears instantly and is copied to the clipboard.
3. 3In Batch mode, set the amount with the slider from 1 to 1000 and click Generate - each UUID is shown on its own line.
4. 4In Validate mode, paste a UUID into the field - the tool instantly shows whether the format is valid and which version was detected.
5. 5Copy the result with the Copy button.

Specifications and limits

Generates version 4 UUIDs according to RFC 4122. Uses the browser's crypto.randomUUID() API - a cryptographically secure randomness source with no external dependencies. Batch generation: 1 to 1000 UUIDs at once, one UUID per line. Validator: checks UUID format and detects the version (v1, v3, v4, v5). Output is always lowercase. Processing happens exclusively in the browser - no UUID is logged or sent anywhere.