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正则表达式测试

测试正则表达式，支持实时匹配、高亮和捕获组。

//g

About Regular Expressions

Regular expressions (regex) are powerful patterns used for matching, searching, and replacing text. They're essential for input validation, text processing, and data extraction. This tool tests your regex in real-time with JavaScript's regex engine.

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使用方法

  1. Enter your regex pattern in the pattern field
  2. Add flags (g for global, i for case-insensitive, m for multiline)
  3. Type or paste your test text
  4. View highlighted matches and match details in real-time

常见用途

  • Validating email addresses, URLs, or phone numbers
  • Extracting data from text (log parsing, web scraping)
  • Search and replace operations
  • Input validation in web forms

常见问题

What is a regular expression?
A regular expression (regex) is a pattern used to match, search, and manipulate text. It's supported in virtually every programming language.
How do I test my regex?
Enter your regex pattern in the pattern field, add test text below, and the tool will highlight all matches in real-time. Flags like 'g' (global) and 'i' (case-insensitive) are supported.
Is my regex data safe?
Yes. All regex processing happens in your browser using JavaScript's built-in RegExp engine. No data is sent anywhere.