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Query String Parser & Builder - Online URL Params Editor

Developer Tools builder parser query string URL params
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Query String Parser & Builder

Parse, edit, and build URL query strings with ease.

Supports full URLs, relative query strings (?key=value), or key=value pairs.
Parameters
# Key Value Actions
Parameters as JSON 

      

    

  


  
  

    

      
      

        
        
      

    

    

      
      

        
        
      

    

  


  
  

    

      

        
        
      

    

  


  
  

    

      
Frequently Asked Questions

      

        

          

          

            
A query string is the part of a URL that comes after the ? symbol. It contains key-value pairs separated by &, used to pass data to a web server. Example: ?category=books&sort=price.

          

        

        

          

          

            
Paste any complete URL or just the query portion. The tool extracts the base URL, query parameters, and fragment (#). Duplicate keys are preserved, and you can edit each parameter individually.

          

        

        

          

          

            
URLs only allow a limited set of characters. Our tool encodes special characters (like spaces, &, =) using encodeURIComponent() so the generated URL is valid. You can toggle encoding off if you need raw characters, but that may break the URL.

          

        

        

          

          

            
Simply add multiple parameters with the same key name (e.g., color[]). Our parser preserves duplicates, and when you switch to JSON view, you'll see them grouped as an array.

          

        

        

          

          

            
Yes! Click the "Bulk Edit" button to switch the parameter table into a text area showing the raw key=value&key=value format. Modify it directly and apply changes back to the table.

          

        

        

          

          

            
Absolutely. The fragment (the part after #) is parsed and kept separately. You can edit it in the Hash field, and it will be appended correctly after the query string in the full URL.

          

        

      

    

  


  
  

    
  









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