UUID 生成器
生成各种 UUID 格式的唯一标识符，包括 v1、v4 和 v7。
功能特点
加密随机
使用安全随机数生成
批量生成
一次最多生成 100 个 UUID
多版本支持
支持 UUID v1、v4 和 v7
便捷复制
即时复制单个或全部 UUID
UUID Versions Explained
UUID v4 (Random)
Most commonly used version. Generated using random or pseudo-random numbers. Provides 122 bits of randomness, making collisions virtually impossible.
UUID v1 (Time-based)
Based on timestamp and MAC address (or random node ID). Useful when you need chronologically sortable IDs. Note: May reveal timing information.
UUID v7 (Unix Epoch Time-based)
New format from RFC 9562. Combines Unix timestamp with random data. Provides natural sorting by creation time while maintaining randomness.
使用方法
- Select the UUID version (v4 recommended for most use cases)
- Choose how many UUIDs to generate (1-100)
- Optionally toggle uppercase format
- Click "Generate" to create UUIDs
- Copy individual UUIDs or all at once
常见问题
What is a UUID?
UUID (Universally Unique Identifier) is a 128-bit identifier used to uniquely identify information in computer systems. Also known as GUID (Globally Unique Identifier).
Which UUID version should I use?
For most applications, UUID v4 is recommended due to its simplicity and randomness. Use v7 if you need time-ordered IDs for database indexing.
Can UUIDs collide?
While theoretically possible, the probability of a collision is astronomically low. You'd need to generate about 2.71 quintillion v4 UUIDs to have a 50% chance of a collision.