JSON Validator
How to Use JSON Validator
1
Paste or Upload JSON
Paste raw JSON into the editor, upload a .json file, or click "Load Sample" to begin.
2
Validate Instantly
Click Validate to see a green success banner or a precise error with line and column numbers.
3
Format, Minify & Export
Beautify with 2 spaces or tabs, compress to a single line, or download the validated JSON.
Key Features
Precise Error Reporting
Syntax errors show the exact line, column, and a human-readable description of the problem.
Format & Minify
Beautify valid JSON with 2-space, 4-space, or tab indentation, or compress it to one line.
File Upload & Download
Load .json files directly and download the validated or formatted result in one click.
Success Statistics
See JSON type, key count, array length, and nesting depth for the validated document.
100% Client-Side
All validation happens locally in your browser. Nothing is sent to any server.
Frequently Asked Questions about JSON Validator
Common causes are missing or extra commas, unquoted keys, single quotes instead of double quotes, trailing commas, and unmatched brackets.