Bee Hive
JSON Validator
Validate and format your JSON data.
About JSON Validator
Frequently Asked Questions
Why is my JSON invalid?
Common reasons include missing quotes around keys, trailing commas, or mismatched brackets. The error message usually points to the specific location of the issue.
Is my data sent to a server?
No, all validation happens locally in your browser. Your data never leaves your device.
Can it validate large files?
Yes, but extremely large files might slow down the browser since it is client-side processing.
What is JSON used for?
JSON is commonly used for data exchange between web servers and clients, API responses, configuration files, data storage, and inter-process communication. It's the de facto standard for modern web APIs.
What's the difference between JSON and JavaScript objects?
While they look similar, JSON is stricter: all keys must be enclosed in double quotes, strings must use double quotes (not single), and JSON doesn't support functions, comments, or trailing commas that JavaScript allows.
How do I fix 'Unexpected token' errors?
This typically means you have invalid syntax like a trailing comma, missing comma between elements, single quotes instead of double quotes, or unescaped special characters in strings. Check the line number in the error message.
Can this tool format or beautify JSON?
This tool focuses on validation. For formatting and beautifying JSON with proper indentation, please use our JSON Formatter tool.
Does it validate JSON Schema or structure?
No, this tool only validates JSON syntax (whether it's well-formed). It doesn't validate against a specific schema or check if the data structure meets your application's requirements.
Why can't I use comments in JSON?
The JSON specification (RFC 8259) doesn't support comments. This is intentional to keep JSON simple and unambiguous. If you need comments, consider using JSON5 or JSONC, though these aren't standard JSON.
What are the JSON data types?
JSON supports six data types: strings (text in double quotes), numbers (integers or decimals), booleans (true or false), null, arrays (ordered lists in square brackets), and objects (key-value pairs in curly braces).