Best uses
API responses, JSON validation, debugging, configuration files, documentation examples and structured data inspection.
JSON Formatter & Validator
Format, validate, beautify and minify JSON online for free. Quickly find JSON syntax errors and turn compact data into clean, readable JSON.
Result
What Is a JSON Formatter and Validator?
JSON (JavaScript Object Notation) is a common data format used by APIs, websites, applications and developer tools. A JSON formatter adds indentation and line breaks so structured data is easier to read, while a validator checks whether the JSON follows valid syntax.
How to Use This JSON Tool
- Paste or type your JSON into the input box.
- Click Format JSON to beautify it.
- Use Minify JSON when you need compact JSON.
- If there is a syntax problem, the tool displays the error.
- Click Copy Result to copy the generated JSON.
Common JSON Errors
- Missing commas between properties or array items.
- Using single quotes instead of JSON double quotes.
- Missing or mismatched braces and brackets.
- Unquoted property names.
- Trailing commas before a closing brace or bracket.
Format vs. Minify JSON
Formatting JSON makes it easier for developers to inspect and debug structured data. Minifying JSON removes unnecessary whitespace, which can make the final data more compact.