JSON Formatter

Paste raw JSON to validate, pretty-print, minify, and inspect syntax errors with exact line and character position.

Input JSON
Validation
Valid JSON
Formatted Output (Beautified)
{
  "user": {
    "id": 42,
    "name": "Avery Developer",
    "roles": [
      "admin",
      "editor"
    ],
    "active": true
  },
  "meta": {
    "source": "api",
    "tags": [
      "internal",
      "analytics"
    ],
    "lastLogin": "2026-02-14T01:23:45Z"
  }
}

About JSON Formatter & Validator

This JSON Formatter is an essential tool for developers who work with APIs, configuration files, or data interchange. Raw JSON (JavaScript Object Notation) is often minified or poorly formatted, making it difficult to read and debug. Our tool instantly beautifies generic JSON data, making it human-readable with proper indentation and syntax highlighting.

Why use this JSON Tool?

  • Validate JSON: Quickly check if your JSON string is valid. We provide precise error messages pointing to the exact line and character causing syntax issues.
  • Beautify / Prettify: Convert ugly, minified JSON strings into a clean, indented structure that is easy to scan.
  • Minify / Compress: Remove whitespace to reduce payload size for production environments.
  • Secure & Client-Side: All processing happens in your browser. Your data is never sent to our servers, ensuring privacy for sensitive payloads.

Common JSON Errors

Even experienced developers make syntax mistakes. Common issues this validator catches include:

  • Trailing commas (e.g., {"key": "value",} is invalid).
  • Missing quotes around keys.
  • Using single quotes instead of double quotes.