JSON is a common data format for APIs, configuration files and application settings. Formatting makes nested objects and arrays easier to inspect, while validation helps identify syntax problems.
What this tool helps you do
- Indent nested objects and arrays
- Check JSON syntax
- Make long data structures easier to read
- Copy formatted output for development work
How to use the JSON Formatter and Validator
- Paste the JSON text into the editor.
- Run the formatter or validator in the connected tool.
- If an error appears, review the indicated location and check commas, quotation marks, brackets and value types.
- Format the corrected data and compare it with the original before using it in an application.
Example
A JSON object uses double quotes around property names and string values. A trailing comma after the final property is not valid JSON.
Frequently asked questions
Does formatting change the data?
A formatter should change whitespace and indentation, not the underlying values. Review the output before replacing a production configuration.
Why does my JSON fail validation?
Common causes include missing commas, single quotes, unclosed brackets, unquoted property names and trailing commas.
Is JSON the same as JavaScript?
No. JSON is a data interchange format with stricter syntax than JavaScript object literals.
Before you use the result
Do not paste API keys, passwords, private tokens or confidential production data into an online formatter unless the service is approved for that data.
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