JSON Formatter & Validator
The ultimate tool to format, validate, minify, and fix your JSON data. Features a smart auto-fixer, interactive tree view, and instant error detection.
Why use this JSON Formatter?
- ✓
Smart Auto-Fix: Automatically repairs common errors like trailing commas or missing quotes.
- ✓
Interactive Tree View: Navigate deep nested structures with ease using our collapsible tree visualization.
- ✓
Instant Validation: Get real-time feedback with precise error locations (line/column).
- ✓
Privacy First: All processing happens in your browser. Your data never leaves your device.
Common JSON Errors
Trailing Commas
JSON does not allow a comma after the last item in an array or object. Our tool fixes this automatically.
Single Quotes
Standard JSON requires double quotes for strings and keys. We convert single quotes for you.
Frequently Asked Questions
What is JSON?
JSON (JavaScript Object Notation) is a lightweight data-interchange format. It is easy for humans to read and write and easy for machines to parse and generate.
Is this tool safe?
Yes! This tool runs entirely on the client-side (in your browser). No data is sent to any server, ensuring your sensitive JSON remains private.
Can it minify JSON?
Absolutely. Use the "Minify" button to remove all unnecessary whitespace, making your JSON file size as small as possible for production use.