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ToolsForDevs

UUID Generator

Generate random UUIDs (v4) or timestamp-based UUIDs (v1) instantly. All processing happens in your browser.

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Click "Generate V4" to create UUIDs

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How to Use the UUID Generator

Our UUID generator helps you quickly create universally unique identifiers for your applications. Choose between random UUID v4 or timestamp-based UUID v1, select the quantity you need, and generate instantly.

Features

  • UUID v4 (Random): Generate cryptographically strong random UUIDs
  • UUID v1 (Timestamp): Generate time-based UUIDs with timestamp information
  • Bulk Generation: Create up to 50 UUIDs at once
  • Case Toggle: Switch between uppercase and lowercase formats
  • Copy Individual or All: Copy single UUIDs or all at once
  • Instant Generation: No server requests, everything runs locally

What is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit label used to uniquely identify information in computer systems. Also known as GUIDs (Globally Unique Identifiers), UUIDs are designed to be unique across space and time without requiring a central registration authority.

UUID Versions

UUID v4 (Random): The most commonly used version. Generated using random or pseudo-random numbers. Format: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx
UUID v1 (Timestamp-based): Generated using a timestamp and MAC address. Useful when you need time-ordered UUIDs. Format includes timestamp information that can be extracted if needed.

Common Use Cases

  • Database primary keys and record identifiers
  • Session IDs and authentication tokens
  • File names and temporary file creation
  • Distributed systems and microservices
  • API request tracking and correlation IDs
  • Message queue and event identifiers

UUID Format

UUIDs are typically represented as 32 hexadecimal digits, displayed in five groups separated by hyphens: 8-4-4-4-12 (total of 36 characters including hyphens). Example:550e8400-e29b-41d4-a716-446655440000

Privacy & Security

All UUID generation happens locally in your browser using the Web Crypto API for v4 UUIDs, ensuring cryptographically strong randomness. No UUIDs are sent to any server, and no data is stored or tracked. Your generated UUIDs are completely private.

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