UUID Generator

Generate UUID v4 / v7 / ULID / NanoID

UUID Generator is a free online Developer tool. Generate UUID v4 / v7 / ULID / NanoID Related terms: uuid · guid · nanoid · 雪花id · snowflake. Use it on this page without signing in.

结果（共 5 条）
UUID v4
36 字符，8-4-4-4-12 格式，纯随机。最通用的唯一标识。
550e8400-e29b-41d4-a716-446655440000
UUID v7
前 48 位为毫秒时间戳，可按时间排序，适合数据库索引。
NanoID
21 字符 URL 安全 base64，比 UUID 短，碰撞概率极低。
ULID
26 字符 Crockford base32，时间排序，大小写不敏感友好。
Help

使用说明

  1. 选择需要的 ID 类型（UUID v4/v7、ULID、NanoID）
  2. 设置生成数量和 NanoID 长度
  3. 点击「生成」按钮批量产出
  4. 点击单条或全部复制结果

常见问题

  • 生成的 ID 会重复吗？ v4 基于随机数，理论碰撞概率极低；v7/ULID 含时间戳，天然有序
  • 数据处理安全吗？ 使用浏览器密码学随机数生成，不联网
  • v4 和 v7 怎么选？ 需要排序选 v7，纯随机选 v4

补充说明

NanoID 比 UUID 更短（默认 21 字符），URL 安全，适合做前端短标识；ULID 同样有序且大小写敏感排序友好。

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FAQ about UUID Generator

What can UUID Generator do?

UUID Generator is a Developer tool. Generate UUID v4 / v7 / ULID / NanoID You can finish the job on this page.

Who should use UUID Generator?

Anyone handling uuid · guid · nanoid · 雪花id · snowflake who does not want to install desktop software can use UUID Generator in the browser.

Is UUID Generator safe? Is my data uploaded?

This tool runs in your browser. We do not collect the content you enter into UUID Generator just because you used it.

What similar tools exist?

Related tools in the same Developer group are listed at the bottom of this page.