How to Format, Validate, and Debug JSON

JSON is everywhere — APIs, config files, databases. But when it's minified into one line, it's unreadable. Here's how to make sense of it.

The Problem

{"users":[{"id":1,"name":"Alice","email":"alice@example.com","roles":["admin","editor"]},{"id":2,"name":"Bob","email":"bob@example.com","roles":["viewer"]}]}

That's valid JSON. But try finding Bob's email.

Step 1: Format (Beautify)

Paste it into the JSON Formatter and click Format:

{
  "users": [
    {
      "id": 1,
      "name": "Alice",
      "email": "alice@example.com",
      "roles": ["admin", "editor"]
    },
    {
      "id": 2,
      "name": "Bob",
      "email": "bob@example.com",
      "roles": ["viewer"]
    }
  ]
}

Instantly readable.

Step 2: Validate

The formatter also validates your JSON in real time:

✅ Valid JSON → green badge
❌ Missing comma, trailing comma, unclosed bracket → red badge with exact error location

Step 3: Minify (When Needed)

Need to send JSON in an API request? Click Minify to compress it back to a single line. Saves bandwidth for large payloads.

Common JSON Errors

❌ { name: "Alice" }          ← Unquoted key
❌ { "name": "Alice", }       ← Trailing comma
❌ { "name": 'Alice' }        ← Single quotes
❌ { "name": "Alice"          ← Missing closing brace

✅ { "name": "Alice" }

Related Tools

JSON Formatter — format, validate, minify
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