Regex Tester

Runs in your browser — nothing is uploaded
/ /

Illustrative common patterns — not exhaustive or RFC-perfect (email addresses in particular have a famously huge fully-correct grammar); good enough for everyday validation, not a substitute for testing against real-world data.

Highlighted matches

  


  

    

      

        
Matches (0)

        

      

    

    

      

        

          Replacement preview
          
        

        

      

    

  







About this tool
Tests a pattern against your browser's real RegExp engine — there's no separate regex implementation here to disagree with your JavaScript, Python, or any other engine's exact behavior, but since JS regex is one of the most common flavors this covers the vast majority of everyday cases.


Frequently asked questions
What is Regex Tester?
Test a pattern against text with live match highlighting and capture groups. It is one of the Text & String Tools tools on MyCodeTips.
How do I use Regex Tester?
Open the tool, enter or paste your input, and the result appears right away. Use the Copy button to copy it.
Is Regex Tester free to use?
Yes. It is free to use and does not need an account.
Is my data safe with Regex Tester?
Yes. It runs entirely in your browser, so what you enter is never uploaded to our servers.
Can I share my result?
Yes. Use the share buttons below the tool to post a link or copy a link to the tool page.

  

     Share this tool
        
        
        
        
        
        
        
        
        
        
        
    Link copied