What Is JSONLint?
JSONLint is the original, open-source linter for JavaScript Object Notation format. Developed years ago, it remains one of the most reliable and thorough syntax checkers for JSON payloads available on the web.
- Detects missing commas, trailing commas, and unquoted strings.
- Draws a trace map pointing directly to the exact character error.
- Supports formatting to make minified server responses readable.
Why Use JSONLint Online?
- Copy output from an API response and drop it in the validator.
- If there's an issue, JSONLint will highlight it immediately.
- Save debugging time and avoid tracking down backend 500 errors.