Regex Code Generator

What Is a Regex Code Generator?

Turn a debugged regular expression into ready-to-use code snippets in JavaScript, PHP, Python, Go, or Java with one click. Escaping and flag differences are handled automatically, so you can paste the code straight into your project.

Supported languages and differences

• JavaScript: /pattern/flags literal, supports g/i/m/s/u/y
• PHP: preg_match_all style, JS-only g/y/d flags filtered out
• Python: re.findall, flags mapped to re.I/re.M/re.S
• Go: regexp.MustCompile, flags expressed inline as (?i)(?m)(?s)
• Java: Pattern.compile, supports CASE_INSENSITIVE

Common regex quick presets

The page includes 17 common regex presets (Chinese characters, double-byte characters, email, URL, phone, QQ, postal code, ID card, dates, and various integers/floats). Click one to fill it in and generate code for the selected language.

How to use

1. Pick the target language (JS/PHP/Python/Go/Java)
2. Enter the pattern and flags (JS style), or click a preset above
3. Click "Generate" and copy the code snippet into your project