JSON Formatter
Format, minify, validate, and organize JSON data with advanced features
JSON Formatter & Validator
This tool formats, validates, and minifies JSON so you can quickly spot structure issues and improve readability. It is ideal for API testing, debugging responses, and preparing configuration files.
Common JSON pitfalls
- Missing commas between array or object items.
- Unquoted keys or single-quoted strings (JSON requires double quotes).
- Trailing commas and unmatched braces.
Validation tips
Use formatting to make errors obvious, then validate against a JSON Schema if your API expects specific shapes. Minify before transmission to reduce payload size.
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FAQs
What's the difference between format and minify?
Formatting adds indentation and line breaks for readability. Minifying removes whitespace to reduce size. Both preserve the data content.
Why is my JSON invalid?
Common issues include missing commas, unmatched braces, unquoted keys, and trailing commas. Ensure keys and strings use double quotes and structure is balanced.
Does JSON preserve key order?
JSON objects are unordered by specification. Some tools display insertion order, but relying on it is not portable. Use arrays when order matters.
How can I validate JSON structure quickly?
Use a JSON validator that parses the input and highlights exact error positions. Consider a JSON Schema for enforcing structure across inputs.
Can I validate JSON vs JSON5?
This tool targets strict JSON. JSON5 allows comments and trailing commas; convert to standard JSON before validating.