JSON Validator
Validates JSON syntax and reports errors with exact line and column numbers, plus a plain-language explanation. Includes a "Try Auto-Repair" option for common issues like trailing commas and single quotes.
Use Cases
- Quickly check if a JSON string is syntactically valid
- Find the exact location of a syntax error in a malformed API response
- Validate JSON configuration files before deployment
- Debug JSON parsing errors by getting human-readable explanations
- Auto-repair common JSON issues from hand-edited files
Frequently Asked Questions
What JSON errors does this tool detect?
It detects all syntax errors including trailing commas, missing brackets, unquoted keys, single-quoted strings, duplicate keys, and unexpected tokens.
What does the auto-repair feature do?
Auto-repair attempts to fix common issues like trailing commas, single quotes around strings, unquoted property names, and missing closing brackets. It shows what was changed.
Can I validate JSON against a JSON Schema?
This tool validates syntax only. For validating JSON against a JSON Schema definition, use the JSON Schema Validator tool.