JSON Formatter & Validator

Beautify messy JSON, minify it for production, and validate the syntax in seconds. Everything runs in your browser.

Input JSON

Indent Size

Output

About the JSON Formatter

JSON (JavaScript Object Notation) is the most popular data format for APIs and configuration files. This tool helps developers quickly format, validate and minify JSON without any installation.

Features

Beautify — turns compact or messy JSON into readable, indented output.
Minify — strips whitespace to reduce file size for production use.
Validate — checks if your JSON is syntactically correct and reports errors.
Download — save your formatted JSON as a .json file.

Common JSON Errors

Missing or extra commas between properties.
Single quotes instead of double quotes.
Trailing commas in arrays or objects.
Unescaped special characters in strings.