JSON Validator & Analyzer
Validate JSON syntax and analyze structure with detailed insights
JSON Input
Validation Result
Validated JSON will appear here
Paste JSON in the input area to validate and analyze
Why Validate JSON?
JSON might look simple, but it's surprisingly easy to mess up. A missing comma, an extra quote, or a trailing comma can break everything. And the error messages? Often cryptic and unhelpful.
That's why validating JSON before using it saves tons of headaches. Instead of discovering syntax errors when your app crashes in production, catch them early with clear, helpful error messages.
⚠️ Common mistake:
Copying JSON from browser dev tools often introduces formatting issues. Always validate it first!
JSON Errors We've All Made
Trailing Commas
{
"name": "John",
"age": 30, ← This comma shouldn't be here
}JavaScript is forgiving, but JSON isn't. That extra comma will cause parsing errors.
Unquoted Keys
{
name: "John", ← Keys must be quoted in JSON
"age": 30
}This works in JavaScript objects, but JSON requires all keys to be strings in quotes.
Single Quotes
{
'name': 'John' ← JSON only accepts double quotes
}JSON is strict about quotes. Only double quotes are allowed for strings and keys.
When JSON Validation Saves the Day
Before API Calls
About to send JSON data to an API? Validate it first to avoid getting cryptic 400 Bad Request errors back.
Configuration Files
Working with config files in JSON format? A syntax error can prevent your entire application from starting up.
Data Import
Importing JSON data from external sources? Validation helps catch issues before they corrupt your database or break your app.
Code Generation
Using JSON to generate code or documentation? Invalid JSON will cause the generation process to fail with confusing error messages.