Paste your JSON and instantly check if it's valid. Errors shown with exact positions.
Frequently Asked Questions
What is JSON validation?
JSON validation checks whether a string follows the JSON specification — proper bracket matching, valid quoting, correct data types, no trailing commas, etc.
How does it find error positions?
The validator uses the browser's native JSON parser to identify errors, then scans the input to estimate the line and column number where the problem occurs.
Is this a JSON Schema validator?
No, this validates JSON syntax only (well-formedness). A JSON Schema validator would check your data against a specific schema definition.
What are common JSON errors?
Trailing commas, unquoted keys, single quotes instead of double quotes, missing closing brackets/braces, and comments (which are not valid in standard JSON).