Validate, format, and prettify JSON data with syntax highlighting and statistics
Format, validate, and manipulate JSON data
JSON (JavaScript Object Notation) is a lightweight data-interchange format that's easy for humans to read and write, and easy for machines to parse and generate. Validating JSON ensures your data has correct syntax, proper structure, and will work correctly in applications and APIs. Invalid JSON can cause errors and application crashes.
Simply paste your JSON data into the input field or upload a JSON file. Choose between Format (to prettify), Minify (to compress), or Validate (to check syntax). Click the respective button and the result will appear in the output area. You can also customize formatting options like indent size, key sorting, and unicode escaping.
Format adds proper indentation and line breaks to make JSON readable. Minify removes all whitespace to reduce file size, ideal for production use. Validate checks if your JSON syntax is correct without changing the format. All three modes first validate your JSON for errors.
Yes! When using format mode, you can choose indent size (2, 4, or 8 spaces), sort keys alphabetically for consistent ordering, and escape unicode characters for ASCII compatibility. These options help you format JSON according to your project's coding standards.
After processing JSON, the tool displays detailed statistics including total characters, number of lines, count of objects, count of arrays, number of keys, and number of values. These metrics help you understand the structure and complexity of your JSON data.
When validation fails, check for common errors: missing or extra commas, unquoted keys, single quotes instead of double quotes, trailing commas in arrays or objects, and unclosed brackets or braces. The tool will display an error message to help identify the issue.
Absolutely! All JSON validation, formatting, and minification is performed entirely in your browser using JavaScript. No data is uploaded to our servers or transmitted anywhere. Your JSON data remains completely private and secure on your device.
Yes! After formatting or minifying your JSON, click the Download button to save the result as a .json file to your device. This is useful for saving cleaned-up or optimized JSON data for use in your projects.