UUID Generator

UUID 生成器

在线 UUID 生成工具，支持 UUID v4（随机）和 v7（时间排序）批量生成，支持大写和无连字符选项。

版本
数量

UUID Generator

Generate UUID v4/v7 identifiers online, supports batch generation

Runs locally · Nothing uploaded

Overview

Our online UUID generator supports both v4 random generation and v7 time-ordered generation to meet different use cases. Generate up to 100 UUIDs at once with formatting options like uppercase and hyphen removal. UUID v7 is timestamp-based and sortable, making it ideal for database primary keys and other scenarios requiring ordered identifiers.

Features

  • UUID v4 random generation
  • UUID v7 time-ordered generation
  • Batch generate up to 100 UUIDs
  • Uppercase/lowercase output toggle
  • Hyphen removal option
  • One-click copy single or all UUIDs
  • UUID format validation

How It Works

  1. 1 Choose UUID version: v4 (fully random) or v7 (time-ordered)
  2. 2 Set the count and format options (uppercase, hyphen removal)
  3. 3 Click generate to create UUIDs in the browser
  4. 4 Copy individual UUIDs or use the copy-all button for batch retrieval

Tips

  • Choose UUID v7 when you need time-ordered identifiers, such as database primary keys or log indexing
  • Use the copy-all button after batch generation for easy import into databases or config files
  • Hyphen-free format (32 characters) is ideal for length-sensitive scenarios like short URL generation

Related tools

Tags UUIDIdentifierGenerate

FAQ

What is the difference between UUID v4 and v7?

UUID v4 is fully random, suitable for general-purpose unique identifiers. UUID v7 is timestamp-based with time-ordering properties, ideal for database primary keys or scenarios requiring sequential identifiers. v7 is a newer standard (RFC 9562) that combines uniqueness with orderability.

Can generated UUIDs ever repeat?

UUID v4 has an astronomically low collision probability (approximately 2^122 possible combinations), making duplicates practically impossible in real-world use. UUID v7 combines a timestamp with random suffixes, providing equally strong uniqueness guarantees.

What is the difference between UUID and GUID?

UUID (Universally Unique Identifier) and GUID (Globally Unique Identifier) are technically the same — both are 128-bit unique identifiers. GUID is Microsoft's naming convention, while UUID is the universal standard. They are interchangeable.

All Tools | 京ICP备16061460号-4 | Sitemap