JSON Validator - Validate JSON Online
Free online JSON validator. Check if your JSON is valid and get detailed error messages with line and column numbers.
About JSON Validator - Validate JSON Online
Free online JSON validator. Check if your JSON is valid and get detailed error messages with line and column numbers. All processing happens entirely in your browser — your data is never sent to any server.
Frequently Asked Questions
How does JSON validation work?▼
Our validator parses your JSON string and checks if it conforms to the JSON specification. If there are errors, it highlights the exact line and column where the issue occurs.
What are common JSON errors?▼
Common errors include trailing commas, unquoted keys, single quotes instead of double quotes, missing commas between items, and incorrect data types.