JSON Formatter
Format, validate, and minify JSON data instantly
✓ Runs 100% in your browser — no data sent to serversFrequently Asked Questions
What is JSON formatting?
JSON formatting (also called beautifying or pretty-printing) adds proper indentation, line breaks, and spacing to JSON data to make it human-readable. This tool converts minified JSON into a clean, structured format that's easy to read and debug.
Why is my JSON invalid?
Common JSON errors include: missing quotes around keys, trailing commas, single quotes instead of double quotes, unescaped special characters, and mismatched brackets. Our validator shows you exactly where the error occurs so you can fix it quickly.
What is the difference between JSON format and minify?
Formatting adds whitespace and indentation to make JSON readable by humans. Minifying removes all unnecessary whitespace to reduce file size, which is useful for production APIs and reducing bandwidth usage.
Is it safe to paste JSON here?
Yes, absolutely safe. This tool runs 100% in your browser using JavaScript. Your JSON data never leaves your computer or gets sent to any server. Everything is processed locally on your device.
Can this handle large JSON files?
Yes, this formatter can handle JSON files up to several megabytes in size. Since it runs in your browser, the limit depends on your device's memory. For extremely large files (100MB+), you may experience slower performance.
What does the AI Explain feature do?
The AI Explain feature uses Claude AI to analyze your JSON structure and explain what the data represents in plain English. It's helpful for understanding complex API responses or unfamiliar data structures.