Free, browser-based utilities for everyday developer workflows

Regex Generator & Tester

Build and test regular expressions in your browser. Use presets and snippets to generate patterns, then run them against sample text with flags and highlighted matches.

  • Build and test regex patterns against text.
  • Highlight matches, groups, and flags.
  • Great for validation and log parsing.
Pattern & Test Data

Enter a regular expression, choose flags, add snippets, and test it against your sample text. Matches and capture groups are listed and highlighted.

Pattern & Flags

Flags:
Pattern snippets (click to append):

Test Text & Results

No matches yet. Enter a pattern and click "Run test". 

                  


                  

                    
                    
    
                      
                    

                  

                

              

            


            
            

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How to use Regex Tester

  
Type a regular expression into the pattern field and paste your test string into the input area. All matches are highlighted in real time. You can enable flags such as global, case-insensitive, or multiline, and view each captured group in the matches panel.

  
Common use cases

  
Developers use this to build and verify regex patterns for input validation, log parsing, and data extraction. QA engineers use it to test patterns before embedding them in automated tests, and data engineers use it to prototype transformation rules for text processing pipelines.

  
Why run this in your browser?

  
All processing happens locally in your browser. Your data never leaves your machine, making it safe for sensitive payloads, internal API responses, and confidential configurations.