JSON Formatter & Validator
Check whether JSON is valid and display it in a readable or compact format.
How to use this tool
Paste complete JSON such as {"name":"Alex","age":25}. Press Format JSON to indent it, Minify to remove optional whitespace or Validate only to check syntax. JSON comments and trailing commas are not allowed.
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Practical example: Debugging configuration files
Paste {"enabled":true,"items":[1,2]} and format it to inspect the structure. If the text has missing quotation marks or commas, validation reports an error.
What to check before using the result
Valid JSON is not necessarily valid for a particular API schema. Formatting does not confirm the correctness of field names or values.
Frequently asked question
Does formatting change the data?
It changes whitespace and layout, not the parsed JSON values.
For more guidance, visit the OpenToolKit practical guides and check how processing works.