Is Regex Explainer free to use?

Yes, Regex Explainer is completely free. No registration, no account, and no hidden costs — ever.

Is my data safe when using Regex Explainer?

All processing happens directly in your browser. Your data never leaves your device — nothing is uploaded or stored on our servers.

No. All CheckTown tools work instantly without registration or sign-up.

Regex Explainer works on any device — desktop, tablet, or phone. The interface adapts to your screen size.

粘贴正则表达式，即可查看通俗易懂的解释

正则表达式

标志

测试字符串（可选）

输入正则表达式以进行解析

逐一解读你的正则表达式中每个组成部分的含义

Ctrl+Enter 运行Ctrl+Shift+C 复制

用通俗易懂的讲解揭开正则模式的神秘面纱。

什么是正则表达式？

正则表达式（regex）是用于定义搜索模式的字符序列。几乎每一种编程语言和文本编辑器都使用它，通过规则而非精确文本来查找、匹配和处理字符串。一条正则表达式模式可以匹配成千上万个结构相同的不同字符串。