JSON Encoder/Formatter
Format, prettify, minify, and validate JSON data instantly
How to Use the JSON Encoder
Paste JSON Data
Copy and paste your JSON data into the input field, or load an example.
Choose Action
Select format, minify, or validate mode based on your needs.
Get Results
View formatted, minified, or validation results instantly.
JSON Tool Features
Format & Prettify
Convert minified JSON into human-readable format with customizable indentation (2, 4, or 8 spaces).
Minify JSON
Remove all whitespace and line breaks to reduce file size for production environments and APIs.
Validate JSON
Check JSON syntax validity and get detailed error messages with line and column numbers for debugging.
Size Statistics
View original size, output size, and compression/expansion percentage to track your optimizations.
What is JSON?
JSON (JavaScript Object Notation) is a lightweight data interchange format that's easy for humans to read and write, and easy for machines to parse and generate. It's the most widely used data format for APIs and web services.
JSON Syntax Rules
- •Data is in name/value pairs:
"name": "value" - •Data is separated by commas
- •Curly braces hold objects:
{} - •Square brackets hold arrays:
[] - •Property names must be double-quoted
Common Use Cases
API Development
Format API responses for testing and debugging. Validate JSON payloads before sending requests.
Configuration Files
Format and validate configuration files for applications, including package.json, tsconfig.json, and more.
Data Storage
Minify JSON for efficient storage and transmission. Reduce database payload sizes and network bandwidth.
Code Review
Make JSON data readable for code reviews. Check syntax errors before committing configuration changes.
Privacy & Security
All JSON processing happens entirely in your browser using client-side JavaScript. Your data never leaves your device and is never sent to any server. This tool works completely offline once loaded, ensuring your sensitive data remains private and secure.