fingerprint UUID Generator

Generate UUID v1, v4, v7 with bulk generation and format options

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Bulk Generation

Generate multiple UUIDs at once

UUID Validator & Parser

Validate and extract information from a UUID

About the UUID Generator

Generate universally unique identifiers (UUIDs) instantly with our free online UUID generator. Support for UUID version 1, 4, and 7 with bulk generation and multiple format options. All UUIDs are generated entirely in your browser using cryptographically secure random number generation.

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit identifier that is unique across all devices and all time. UUIDs are used in software development to identify objects, database records, transactions, and more without requiring a central coordinating authority.

UUID Versions Explained

  • UUID v1 (Time-based) — Generated from the current timestamp and node ID (simulated MAC address). Includes embedded timestamp that can be extracted. Good for sorting by creation time.
  • UUID v4 (Random) — Generated using random or pseudo-random numbers. Most commonly used version. Provides the best privacy as it contains no identifiable information.
  • UUID v7 (Unix Time-based) — New standard (RFC 9562) that encodes Unix timestamp in milliseconds. Combines benefits of time-ordering with randomness. Excellent for database primary keys.

UUID Format

A standard UUID is represented as 32 hexadecimal characters, displayed in five groups separated by hyphens:

xxxxxxxx-xxxx-Mxxx-Nxxx-xxxxxxxxxxxx

Where M indicates the version (1, 4, or 7) and N indicates the variant.

Common Use Cases

  • Database primary keys and record identifiers
  • Session IDs and authentication tokens
  • Distributed systems and microservices
  • File naming and document identification
  • API request tracking and logging
  • Object identifiers in cloud storage

Why Use UUID v7?

UUID v7 is the newest standard, offering several advantages:

  • Time-ordered — Natural sorting by creation time improves database index performance
  • Timestamp extraction — Can determine when the UUID was created
  • Better randomness — More random bits than v1 for better collision resistance
  • Database friendly — Ideal for use as clustered primary keys