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UUID / GUID Generator

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Generate universally unique identifiers (UUIDs/GUIDs) with multiple versions and formatting options

Generator Settings

Randomly generated (most common)

UUID Validator

About UUIDs

UUID v1: Generated using timestamp and MAC address. Unique but reveals creation time and hardware.

UUID v4: Randomly generated. Most commonly used. Provides 122 bits of randomness.

UUID v5: Generated using SHA-1 hash of namespace and name. Same inputs always produce same UUID.

NIL UUID: Special UUID consisting of all zeros (00000000-0000-0000-0000-000000000000).

UUID / GUID Generator - Free Online Tool

What is a UUID?

A UUID (Universally Unique Identifier) or GUID (Globally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems. UUIDs are standardized by the Open Software Foundation (OSF) as part of the Distributed Computing Environment (DCE).

UUID Versions Supported

  • UUID v1: Time-based UUIDs generated using timestamp and MAC address information
  • UUID v4: Randomly generated UUIDs (most commonly used for general purposes)
  • UUID v5: Name-based UUIDs using SHA-1 hashing with namespace
  • NIL UUID: Special UUID with all zeros (00000000-0000-0000-0000-000000000000)

Features

  • Generate single or bulk UUIDs (up to 1000 at once)
  • Multiple UUID versions (v1, v4, v5, NIL)
  • Format options: hyphenated or compact
  • Case options: uppercase or lowercase
  • Built-in UUID validator
  • Copy individual or all UUIDs to clipboard
  • Download UUIDs as text file
  • 100% client-side generation (privacy-focused)

Common Use Cases

  • Database primary keys and unique identifiers
  • API request tracking and session IDs
  • File naming and version control
  • Distributed systems and microservices
  • Transaction IDs and order numbers
  • User account identifiers
  • Cloud resource naming

Why Generate UUIDs with FileMint?

  • ✅ Instant generation - no waiting
  • ✅ Multiple UUID versions supported
  • ✅ 100% free with no limits
  • ✅ Privacy-focused - all processing happens locally
  • ✅ Bulk generation up to 1000 UUIDs
  • ✅ Built-in validator for UUID verification
  • ✅ Customizable formatting options
  • ✅ No registration or sign-up required

UUID Format

A standard UUID consists of 32 hexadecimal digits displayed in five groups separated by hyphens, in the form 8-4-4-4-12 for a total of 36 characters. For example: 550e8400-e29b-41d4-a716-446655440000

UUID vs GUID

UUID and GUID are essentially the same thing. UUID is the standardized term from RFC 4122, while GUID is Microsoft's implementation of the same concept. They are interchangeable and follow the same format and generation algorithms.

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