JSON Viewer

View, validate, and explore JSON as a collapsible tree.

Paste JSON to begin.

JSON input

Tree and formatted output

Show formatted JSON text 

                        

                        
                    

                

            


            

                
When to use JSON Viewer

                
Use JSON Viewer for quick, private JSON inspection workflows:

                
    
                    
  • Quick task completion
    Paste JSON and immediately get a sorted tree plus formatted text for review.
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  • Input validation
    Catch malformed JSON before sharing data with teammates or tools.
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  • Workflow debugging
    Expand nested objects and arrays to inspect API responses and edge cases.
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  • Result sharing
    Copy clean formatted JSON into documentation, tickets, or chat without retyping.
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  • Mobile usage
    Review JSON on phone or tablet with stacked panels and touch-friendly controls.
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JSON Viewer FAQ

                

                    
How do I use this app?
Enter or paste JSON, use Format JSON if needed, expand the tree to inspect values, and copy the formatted text when you are done.

                    
Is this app free to use?
Yes. JSON Viewer is free to use and does not require an account.

                    
What happens to my input data?
Your JSON is processed locally in your browser and is not stored by the app. The page does not send it to an API, and refreshing the page clears the working state.

                    
Why am I getting an error or unexpected output?
The input is usually not valid JSON. Check quoted property names, commas, braces, brackets, and trailing commas, then try again with a smaller sample if needed.

                    
Where can I find instructions and troubleshooting tips?
Open the in-app Help panel for keyboard-friendly instructions, workflow tips, privacy notes, and common mistakes before sharing output with teammates.