{ }
JSON Formatter & Validator
TL;DR: Format, validate, and minify JSON data in your browser instantly. Free online JSON formatter and validator supporting nested objects, arrays, and detailed error messages. All processing happens client-side — no data is sent to any server.
How to Use
- 1 Paste your JSON data into the input field on the left.
- 2 Click Format to beautify or Minify to compress.
- 3 Copy the result or download it as a file.
Frequently Asked Questions
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.
Is my data safe?
Yes! All processing happens entirely in your browser. No data is ever sent to any server.
What happens with invalid JSON?
The tool will highlight the error location (line and column) and show a descriptive error message to help you fix it.
Can I minify large JSON files?
Yes, the tool can handle large JSON files. Minification removes all whitespace to reduce file size.
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