Validate the structure before using a payload
JSON represents objects, arrays, strings, numbers, booleans and null values. Small punctuation mistakes can make an API payload unreadable. A missing closing brace or a trailing comma will fail strict parsing. Paste the text into this tool and choose your indentation preference. The browser parses it and shows a formatted version or an error message when it cannot be read.
Correct syntax is not the same as correct data
A valid object can still violate the requirements of the API or application that receives it. For example, {"price":"ten"} is valid JSON even if a program expects price to be numeric. This formatter does not enforce a schema, validate URLs or check whether IDs refer to real records. Review the expected field types separately and keep secrets such as API keys out of shared screenshots.
Example workflow
Try {"name":"Sample","tags":["new","draft"],"enabled":true}. Then remove the final closing brace to see a parse error. Restore it and compare two-space versus compact formatting.
Try this toolThree things to remember
- Strings and object keys require double quotation marks.
- JSON does not allow trailing commas or comments.
- Never confuse pretty formatting with schema validation.
Frequently asked question
Is uploaded JSON stored?
No. The parser runs in browser memory, and the tool has no JSON upload endpoint.