Pretty print, minify, and validate JSON with line and column error details.
Tool introduction
The JSON Formatter / Validator turns compact or messy JSON into readable indented output. It can also minify JSON and show validation errors when the input is not valid.
Developers, API testers, support teams, and students use JSON formatters to inspect API responses, config files, logs, and webhook payloads.
Privacy and processing
Use double quotes for JSON keys and string values.
Remove trailing commas because JSON does not allow them.
Do not paste secrets into shared screenshots.
Format first when debugging, then minify only when needed.
Validate JSON before sending it to production APIs.
It adds indentation and line breaks so nested objects and arrays are easier to read.
It removes unnecessary spaces and line breaks so the JSON becomes smaller.
It shows errors, but you should review and fix invalid input yourself so the data remains correct.
No. JSON is stricter. Keys must use double quotes, and trailing commas are not allowed.
Yes. It is useful for reading API responses, request bodies, and webhook payloads.
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