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Regex Tester

Test regular expressions dynamically against strings.

/
/
No matches
No matches found in the test string.

Quick Reference

^ Start of string
$ End of string
\d Digit
\w Word character
+ 1 or more
* 0 or more
? 0 or 1
. Any character

What is the Regex Tester & Builder?

Regular expressions (regex) are incredibly powerful sequences of characters that specify a search pattern in text. Used heavily in computer science, software engineering, and data validation, this tool provides a secure, client-side sandbox to build, test, and debug your regex patterns against multiline strings in real time.

How to use this tool

1

Input your regular expression pattern in the top-left field without the surrounding slashes.

2

Adjust your regex flags (e.g. g for global, m for multiline, i for case-insensitive) in the top-right field.

3

Type or paste your test string into the text area.

4

View live matched results extracted dynamically in the Match Results panel.

Why use KD Websoft?

Full-Stack Web & Mobile Engineering
Complex Data parsing and ETL Pipelines
Custom API & Backend Architecture
Quality Assurance and Automated Testing

Need a Custom Software Solution?

You're using our free regex tester & builder. If your business needs a fully customized web application, mobile app, or dedicated AI software, KD Websoft is here to build it.

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