🔧 JSON Formatter & Validator
Format, validate, and beautify your JSON data instantly
📝 Input JSON
1
✅ Formatted Output
1
// Your formatted JSON will appear here...
Lightning Fast
Instant formatting and validation with real-time feedback
Beautiful UI
Modern, responsive design that works on all devices
Error Detection
Precise error messages with line and column numbers
Mobile Friendly
Fully responsive design optimized for mobile devices
What is a JSON Formatter?
- A JSON formatter is a tool that takes messy or minified JSON and rewrites it in a clean, readable structure using proper indentation, line breaks, and spacing.
- Its main goal is readability—so developers can quickly scan objects/arrays, understand nesting, and debug faster (especially with large API responses).
- Many formatters also offer “minify” mode, which removes extra spaces/new lines to reduce size for storage or transfer, but formatting itself doesn’t guarantee the JSON is valid.
What is a JSON Validator?
- A JSON validator is a tool that checks whether your JSON follows valid JSON syntax rules (for example: proper quotes, commas, brackets, and overall structure).
- If the JSON is broken, a validator typically highlights the error and may point to the line/position so you can fix it quickly.
- Some validators also support schema validation, meaning they can check whether the JSON matches an expected structure (like required fields and data types), not just whether it “parses”.
FAQ
1. Is JSON formatter and JSON validator the same?
No—formatting makes JSON pretty and readable, while validation checks whether the JSON is actually correct (and sometimes whether it matches a schema).
2. Can formatted JSON still be invalid?
Yes—if the input has syntax mistakes (like missing commas or quotes), formatting alone can’t make it valid; validation is what confirms correctness.
3. Why does JSON validation matter for APIs?
APIs and apps expect strict JSON syntax, so invalid JSON can break parsing and cause errors in clients, servers, or automated tests.
4. What common JSON errors do validators catch?
Missing commas, extra trailing commas, unquoted keys, single quotes instead of double quotes, and mismatched braces/brackets are common issues validators detect.