JSON Validator
Paste JSON to validate its structure and syntax. Get detailed error locations.
Input
Formatted Output
About JSON Validator
The JSON Validator checks whether your JSON is syntactically correct and reports any errors with precise line and column numbers. It's faster than running code to check if JSON parses correctly and gives more helpful error messages than most browsers' developer consoles.
Common JSON mistakes include trailing commas, single quotes instead of double quotes, unquoted keys, and missing closing brackets — this validator catches them all and tells you exactly where to look.
Use this before sending JSON to an API, storing it in a database, or deploying a configuration file to avoid runtime parsing errors.
Features
- ✓Validates JSON syntax with precise error locations
- ✓Identifies trailing commas, unquoted keys, and other common mistakes
- ✓Reports line and column number for each error
- ✓Clear pass/fail status indicator
- ✓Works with any valid JSON including large documents
Common Use Cases
- →Validating API request bodies before sending
- →Checking configuration files before deployment
- →Debugging JSON parse errors in development
- →Pre-validating data before database insertion