Regex expression code generator Online

What is Regex expression code generator?

The tool allows you to generate Regex expression code for javascript PHP go JAVA rb python language.

You could test your Regex expression here: Regex expression tester online, then use this tool to generate codes for using.

For examples, Match letter regex expression is ^[a-zA-z]*$

The tool will generate javascript Regex code:

var pattern = /^[a-zA-z]*$/,
	str = '';
console.log(pattern.test(str));

The code you will use in webpage could be

<script> 
var pattern = /^[a-zA-z]*$/,
	str = '';
console.log(pattern.test(str));

var str = 'abcdefgABCDEFG';
var result = str.match(re); 
document.writeln(result == null ? 'error<br><br>' : result[0] + '<br><br>'); 
</script>