JSON Validator
Validate, format, and fix your JSON. Shows detailed error messages with line numbers.
About
JSON (JavaScript Object Notation) is the most common data format for APIs and configuration files. This validator checks your JSON syntax, shows detailed error messages with approximate line numbers, and can auto-format or minify your JSON. All processing is local.
FAQ
What are common JSON errors?
Trailing commas, single quotes instead of double quotes, unquoted keys, and missing closing brackets are the most frequent issues.