JSON Schema Validator

Paste a JSON Schema and validate your JSON with instant feedback.
JSON Schema
Runs in your browser
Tip: use common keywords like type, required, properties, items.
JSON Data
Validation results
No results 

      

    


    

      Privacy note: validation happens locally in your browser.
    


            
          

                  
What this validator does

          
It checks JSON data against a schema and reports mismatches in types, required fields, and constraints.

                  
Supported keywords

          
Common keywords like type, required, properties, items, enum, min/max, and pattern are supported.

                  
When to use it

          
Use it to validate API payloads, configs, or data contracts during development.

              

    
          

        
How to validate JSON with a schema

                  
Paste a schema and JSON, then validate.

                          
    
                          
  1. Paste the JSON Schema on the left.
    2. 
                          
  2. Paste JSON data on the right.
    3. 
                          
  3. Click Validate to see errors.
    4. 
                      

              

    
          

        
FAQ

                  

            Does this tool upload my data?
            
No. Everything runs locally in your browser.

          

                  

            Is full JSON Schema supported?
            
It focuses on common keywords for quick validation.

          

                  

            Can I validate arrays?
            
Yes, with the items keyword.