JSON Formatter & Validator
Format, validate, and minify your JSON data. Supports customizable indentation.
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What is JSON?
JSON (JavaScript Object Notation) is a lightweight data interchange format that is easy for humans to read and write, and easy for machines to parse and generate. It is widely used in web APIs, configuration files, and data storage.
How to use this tool
Paste your JSON into the input field, then click Format to pretty-print it with proper indentation, Minify to remove all whitespace, or Validate to check if your JSON is syntactically correct. The tool runs entirely in your browser — your data is never sent to any server.
Frequently Asked Questions
Is this JSON formatter free?
Yes, completely free with no usage limits. No sign-up required.
Is my data safe?
Yes. All processing happens in your browser. Your JSON data is never sent to any server.
What is JSON used for?
JSON (JavaScript Object Notation) is used for data interchange between web servers and clients, configuration files, APIs, and data storage.
Can I format large JSON files?
Yes. The tool handles large JSON files efficiently since it runs entirely in your browser using native JavaScript parsing.