Our JSON Validator instantly checks your JSON data for syntax errors. Paste your JSON and get immediate feedback on whether it's valid or contains errors. Perfect for debugging API responses, config files, and data structures.
Missing commas, unclosed brackets, invalid strings? Our validator pinpoints the exact line and position of syntax errors, helping you fix issues quickly. No more guessing where the problem is in your JSON.
Your JSON data never leaves your browser. All validation happens locally on your device, making it safe to validate sensitive configuration files, API keys, and private data.
JSON validation is the process of checking whether a JSON document follows the correct syntax rules. Valid JSON must have properly matched brackets, quoted keys, and correct data types. Our tool performs strict RFC 8259 compliant validation.
Trailing commas, single quotes instead of double quotes, unquoted keys, and missing colons are the most common JSON errors. Our validator catches all of these and more, providing clear error messages to help you fix them.
Once your JSON is valid, use our built-in formatter to beautify it with proper indentation and syntax highlighting. Export the formatted result or copy it directly to your clipboard.