JSON Validator

Validate, format (beautify), and minify your JSON data. Detect errors instantly with our secure client-side tool.

Paste JSON to validate

Ready

Error Detection

Finds syntax errors like missing commas or brackets instantly.

Auto Formatting

Beautify ugly, minified JSON into readable, indented code.

Fast & Secure

All processing happens in your browser. No data is sent to servers.

What is JSON Validation?

JSON (JavaScript Object Notation) is a lightweight data-interchange format. It is easy for humans to read and write. However, a single missing comma or bracket can break the entire file.

Our JSON Validator parses your code to check for syntax errors. If the JSON is valid, you can choose to format it (Beautify) for readability or Minify it to reduce file size for production use.

Common JSON Errors:

  • Trailing commas after the last element in an object or array.
  • Using single quotes ' instead of double quotes " for strings.
  • Missing key quotes in objects.