📂 Load Sample JSON:
🌲 Interactive Tree View
⚠️ Common JSON Errors & How to Fix Them
JSON has strict syntax rules. Here are the most common mistakes developers make:
WRONG ❌
{"name": "John",
"age": 30, ← comma here
}
CORRECT ✅
{"name": "John",
"age": 30
}
WRONG ❌
{'name': 'John'}
CORRECT ✅
{"name": "John"}
WRONG ❌
{name: "John"}
CORRECT ✅
{"name": "John"}
WRONG ❌
{ // user data
"name": "John"
}
CORRECT ✅
{
"name": "John"
}
📖 How to Use the JSON Formatter
Paste Your JSON
Click inside the dark Input panel on the left and paste your raw JSON using Ctrl+V. Or click one of the Sample JSON buttons to load an example instantly.
Click Format
Click the ✨ Format button to beautify your JSON with syntax highlighting in the output panel. Use the Indent selector to choose 2 spaces, 4 spaces, or tabs.
Explore the Tree View
Scroll down to the Interactive Tree View to explore your JSON structure. Click any object or array to collapse or expand it.
Copy or Minify
Click 📋 Copy to copy the formatted output, or 📦 Minify to get the smallest possible JSON string for production use.
❓ Frequently Asked Questions
Minifying removes all whitespace and line breaks to produce the smallest possible JSON string. It is used in production to reduce file size and speed up data transfer.
• String —
"hello"• Number —
42 or 3.14• Boolean —
true or false• Null —
null• Object —
{"key": "value"}• Array —
[1, 2, 3]