JSON Formatter & Validator
Format and validate JSON with readable indentation and clear parse errors.
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Overview
Format and validate JSON with clear error feedback. Useful for API debugging, config review, and payload inspection.
How to use
- Paste JSON text.
- Run format/validate.
- Review prettified output or error location.
Examples
-
Valid JSON
Input: {"a":1,"b":2}
Output: Pretty formatted JSON
-
Invalid JSON
Input: {"a":1,}
Output: Error: trailing comma
Notes
- JSON does not allow trailing commas.
- Property names must use double quotes.
- Large payloads may need chunked inspection.
FAQ
- Does it fix invalid JSON automatically?
- It reports errors; structural fixes are manual.
- Can I validate arrays too?
- Yes, arrays and nested objects are supported.
- Any data upload?
- No, local browser processing only.
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