JSON Validator
Online JSON validation tool to quickly check if your JSON data format is correct with precise error location.
How to Use
- Paste or type the JSON data you want to validate into the input box.
- Click the "Validate" button to perform the check.
- If the JSON format is correct, a green success message will be displayed.
- If the JSON format is incorrect, a red error message will be displayed with error location information (line and column numbers).
- Click "Example (with errors)" to load a sample JSON with syntax errors.
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About JSON Validator
JSON Validator is a free online JSON syntax checking tool. It helps developers quickly verify whether JSON data conforms to JSON specifications and precisely locates the line and column number of any errors.
During development, JSON format errors are a common issue. Using this tool, you can quickly find and fix JSON syntax errors to improve development efficiency. Supports all standard JSON syntax checks including bracket matching, quote closure, comma usage, and more.
Frequently Asked Questions
JSON validation checks whether your input conforms to the JSON specification (RFC 8259). It detects syntax errors like missing quotes, trailing commas, invalid characters, and structural issues.
Yes, our JSON Schema Validator tool supports JSON Schema Draft-07. You can validate your data against a schema to check types, required fields, patterns, and custom constraints.
Common hidden issues include: trailing commas (not allowed in JSON), unquoted keys, single quotes instead of double quotes, comments (not allowed in JSON), and Unicode BOM characters.