正则测试器
用示例文本测试正则表达式，查看每个匹配和捕获组。
使用方法
Testing a pattern
Enter a pattern and flags, provide sample text, and matches are highlighted as you type.
- Type the regular expression.
- Select flags such as global or case insensitive.
- Read the highlighted matches and groups.
常见问题
Which regex flavour is used?
The JavaScript RegExp engine, so it matches how your browser interprets patterns.
Can a pattern freeze the page?
A high match limit protects against runaway patterns and shows a warning if the limit is reached.