首页Home › 随机生成Random Generators
🔌 随机端口号生成器Random Port Generator
随机生成 TCP/UDP 端口号，可选范围：全部 1–65535、仅动态/临时端口（49152–65535，适合避开占用）、注册端口（1024–49151）或自定义范围；可一次生成多个且不重复，并标出常见服务占用的知名端口。适合开发、测试、Docker 端口分配和脚本。Generate random TCP/UDP port numbers in a chosen range — all 1–65535, dynamic/ephemeral only (49152–65535, good for avoiding clashes), registered (1024–49151) or a custom range — several at once without repeats, flagging well-known ports used by common services. Handy for development, testing, Docker port mapping and scripts.
使用说明与常见问题How-to & FAQ
「随机端口号生成器」是什么？What is the Random Port Generator tool?
随机生成 TCP/UDP 端口号，可选范围：全部 1–65535、仅动态/临时端口（49152–65535，适合避开占用）、注册端口（1024–49151）或自定义范围；可一次生成多个且不重复，并标出常见服务占用的知名端口。适合开发、测试、Docker 端口分配和脚本。Generate random TCP/UDP port numbers in a chosen range — all 1–65535, dynamic/ephemeral only (49152–65535, good for avoiding clashes), registered (1024–49151) or a custom range — several at once without repeats, flagging well-known ports used by common services. Handy for development, testing, Docker port mapping and scripts.
如何使用「随机端口号生成器」？How do I use the Random Port Generator tool?
在「随机端口号生成器」中，按需设置「范围」、「最小」、「最大」、「数量」等选项，然后点击「生成」、「复制」按钮即可。In the Random Port Generator: Set "Range", "Min", "Max", "Count", then click "Generate", "Copy".
端口号范围是怎么划分的？How are the port ranges defined?
按 IANA 规定：0–1023 为知名端口（需管理员权限），1024–49151 为注册端口，49152–65535 为动态/临时端口。要为本地服务随机分配、避免与常用服务冲突时，建议用动态/临时范围。Following IANA: 0–1023 are well-known ports (needing admin rights), 1024–49151 are registered, and 49152–65535 are dynamic/ephemeral. For assigning a local service at random without clashing with common services, use the dynamic/ephemeral range.
为什么有些端口带有提示？Why are some ports flagged?
如果抽到的端口常被某个服务使用，工具会提示，提醒你换一个以免冲突：1024 以下标为“知名端口”（如 22=SSH、80=HTTP、443=HTTPS），1024 及以上标为“注册端口，常被某服务使用”（如 3306=MySQL、5432=PostgreSQL、8080）。此列表只涵盖最常见的服务，不是完整清单。If a drawn port is used by a common service, the tool says so to warn you of a possible clash: ports below 1024 are marked well-known (22=SSH, 80=HTTP, 443=HTTPS), and ports from 1024 up are marked as registered ports often used by that service (3306=MySQL, 5432=PostgreSQL, 8080). The list covers only the most common services, not every assignment.
端口是随机且不重复的吗？Are the ports random and unique?
使用 crypto.getRandomValues 等概率抽取；勾选“不重复”时一次结果内不会出现相同端口，前提是范围内的端口数不少于数量。Yes, drawn with crypto.getRandomValues; with No repeats ticked, one result never repeats a port, provided the range holds at least as many ports as the count.
TCP 和 UDP 的端口号一样吗？Are TCP and UDP ports the same?
端口号本身的范围（0–65535）对 TCP 和 UDP 相同，但它们是相互独立的两套，同一个号码在 TCP 和 UDP 上可以分配给不同服务。本工具只生成号码，不区分协议。The number range (0–65535) is the same for TCP and UDP, but they are two independent sets — the same number can be used by different services on TCP and UDP. This tool generates the number only and does not distinguish the protocol.
随机结果真的随机吗？Is the randomness truly random?
「随机端口号生成器」使用浏览器的 crypto.getRandomValues（密码学安全随机数）生成结果，并做了无偏处理，每个结果出现的概率相同。The Random Port Generator uses crypto.getRandomValues (cryptographically secure randomness) with unbiased sampling, so every outcome is equally likely.
「随机端口号生成器」免费吗？需要注册吗？Is the Random Port Generator free? Do I need an account?
「随机端口号生成器」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Random Port Generator is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.