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JSON Decode Online

Decode and validate a JSON string into a readable format.

When to use this tool

Perfect for debugging API responses, inspecting webhook payloads, or understanding complex nested JSON structures. Quickly validate and visualize JSON data during development without firing up a full debugging tool.

How to use

Paste a JSON string into the input field. The tool parses and displays it in a human-readable tree or table format. If the JSON is invalid, you will see an error message pointing to the syntax issue.

Output
Download Image 

								
								
								
							

						


						

							

								

									
Workflow chain

									
Continue with tools that fit this output and developer workflow.

								

								
							


							

								

								
							

						

					

				


				
				

		
How this works


					

				
How this works

				

											
The tool parses the input as JSON, validates the syntax, and renders the decoded structure in a readable form.

											
Objects, arrays, strings, numbers, booleans, and null values are preserved so you can inspect the data shape before using it in code.

									

			

		
					

				
Examples

				

											

															
Simple object

							
							

								

									
Input

									
{"name":"John","age":30}

								

								

									
Output

									
Array
(
    [name] => John
    [age] => 30
)

								

							


															
Useful for quickly checking a compact API response.

													

											

															
Nested payload

							
							

								

									
Input

									
{"user":{"id":42,"roles":["admin","editor"]}}

								

								

									
Output

									
Array
(
    [user] => Array
        (
            [id] => 42
            [roles] => Array
                (
                    [0] => admin
                    [1] => editor
                )
        )
)

								

							


															
Nested objects and arrays remain visible after decoding.

													

									

			

		
					

				
Edge cases to know

				
    
											
  • JSON keys and string values must use double quotes, not single quotes.
    • 
											
  • Trailing commas are invalid in standard JSON even though JavaScript object literals allow them.
    • 
											
  • Large integers may lose precision in some JavaScript environments after parsing.
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Privacy note

				
This free tool is intended for local inspection of JSON payloads. Avoid pasting production secrets, session tokens, or personal data.