JSON Formatter

Format, minify, and validate JSON with syntax highlighting

Input

What is a JSON Formatter?

A JSON Formatter is a developer tool that takes raw, minified, or poorly structured JSON data and reformats it with proper indentation and line breaks for readability. It ensures your JSON adheres to the correct syntax, making it easier to debug APIs, inspect configuration files, and validate data payloads.

How to Use This JSON Formatter

Paste your raw or minified JSON into the input area.
Click Format to pretty-print with 2-space indentation and syntax highlighting.
Click Minify to compress JSON into a single line for production use.
Click Validate to check syntax — errors show the exact line and column.
Copy the output with one click using the copy button.

Common Use Cases

Debugging API responses and inspecting nested JSON structures.
Pretty-printing minified JSON from production builds or log files.
Validating JSON configuration files before deployment.
Minifying JSON to reduce payload size for network transmission.

Frequently Asked Questions

Does this tool send my JSON to a server?

No. All formatting, minification, and validation happens entirely in your browser. Your data never leaves your device, making it safe for sensitive payloads.

What indentation does the formatter use?

The formatted output uses 2-space indentation, which is the most common convention in modern JavaScript and web development projects.

Can it handle very large JSON files?

The tool processes JSON client-side using the browser's native JSON.parseengine, so it can handle files up to several megabytes depending on your device's memory.