批量生成 UUID(v1/v4) 与 ULID 全局唯一标识符,支持大小写、连字符与大括号格式,一键复制
批量生成 UUID v1/v4 与 ULID,支持大小写、连字符与大括号格式,纯本地随机生成,安全无泄漏。
了解 UUID 与 ULID 的区别、支持的格式与常见问题。The difference between UUID and ULID, supported formats, and answers to common questions.
UUID v4 是完全随机的 128 位标识符(36 字符,含连字符);UUID v1 结合时间戳与节点信息;ULID 是 128 位、26 字符的 Crockford Base32 编码,可排序且对人类更友好。
UUID v4 is a fully random 128-bit identifier (36 chars with hyphens); UUID v1 combines a timestamp with node info; ULID is a 128-bit, 26-character Crockford Base32 encoding that is sortable and more human-friendly.
本工具支持小写/大写、带/不带连字符以及大括号包裹等多种格式。
The tool supports lowercase/uppercase, with/without hyphens and brace-wrapped formats.
UUID v4 的碰撞概率极低,ULID 在同一毫秒内也具备随机性,足以满足绝大多数场景。UUID v4 has a negligible collision probability; ULID stays random within the same millisecond. Plenty for most use cases.
不会,全部使用浏览器本地加密随机数生成,内容不经过服务器。No - everything uses the browser's local cryptographic randomness.
ULID 前 10 个字符是毫秒级时间戳,字典序即时间序。The first 10 characters encode a millisecond timestamp, so lexical order equals time order.