Paste valid JSON to see the output
This free JSON formatter helps you format, validate, and beautify JSON data. All processing happens in your browser - your data never leaves your computer. Perfect for debugging API responses, cleaning up configuration files, or preparing JSON for documentation.
JSON is used by over 80% of public APIs as their primary data format (ProgrammableWeb). According to the Stack Overflow Developer Survey, JSON is the most widely used data interchange format among professional developers worldwide.
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.
{
"name": "SpeedyTools",
"type": "Developer Tools",
"free": true
}
Format & Beautify
Transform minified JSON into readable, indented format
Minify
Remove whitespace to reduce JSON size
Validate
Check if your JSON is valid with detailed error messages
Copy & Download
Easily copy or download your formatted JSON
How do I format JSON online?
Paste your JSON into the input field and click 'Format'. The tool will automatically beautify your JSON with proper indentation and line breaks.
Is this JSON formatter free?
Yes, this JSON formatter is completely free to use with no signup required. All processing happens in your browser.
Is my JSON data secure?
Yes, your data never leaves your browser. All formatting and validation happens locally on your device.
Privacy First
All JSON processing happens in your browser. Your data never leaves your device or gets uploaded to any server.