Developer Tool

Regex. Tested. Live.

Write a regular expression. Paste test text. See matches highlighted in real time. Supports capture groups, flags (g, i, m, s, u), and substitution testing.

Try it free How it works
Free. Unlimited. No signup. Everything client-side.
/^[a-z]+$/gi
Demo

Write a regex. See matches. Live.

Flags: g=global, i=case-insensitive, m=multiline, s=dotAll, u=unicode

Matches: 0


  





  

    
The process

    
How it works. No server. No upload.

    

      

        
01

        
Write your regex

        
Enter the pattern and choose flags (global, case-insensitive, multiline, dotAll, unicode).

      

      

        
02

        
Paste test text

        
Drop any text to test against. Matches highlight in real time.

      

      

        
03

        
Extract and replace

        
See capture groups. Test substitutions with the replace feature.

      

    

  






  

    
Pricing

    
Pay for volume. Not commitment.

    
Start free. Upgrade when you need more. Cancel anytime. No credit card required to try.

    

      

        
Free

        
Starter

        
$0/month

        
For occasional use

        
  • Unlimited testing
  • Live highlighting
  • Capture groups
  • Flags toggle + replace

        Get started
      

      

        
Most popular

        
Pro

        
$3/month

        
For professionals who use this daily

        
  • Save regex patterns
  • Pattern library + share
  • Multi-line regex editor
  • Test against regex flavors (PCRE, Python)
  • API access

        Upgrade to Pro