Overview

The JSON formatter is an online tool that automatically formats and beautifies hard-to-read JSON strings. It supports indentation adjustment and minification (compression), streamlining debugging and inspection of API responses and configuration files.

How to Use

1. Paste the JSON text into the text area.
2. Select the formatting method in Mode: Format / Minify.
3. Select the number of spaces in Indentation.
4. Click the Format button to see the result.
5. Use the clipboard copy button to copy the formatted JSON.

Specifications & Glossary

• JSON (JavaScript Object Notation): A lightweight data exchange format. Human-readable and machine-readable, it is widely used for REST API requests/responses and configuration files. Standardized by RFC 8259 / ECMA-404.
• Format mode: Adds indentation and line breaks to make JSON easy to read. Nested objects and arrays are displayed in a hierarchical structure.
• Minify mode: Removes all line breaks and spaces to compress JSON into a single line. Useful for reducing network transfer size or when using JSON as an HTTP request body.
• Indentation: Sets the number of spaces to use in format mode (e.g., 2 spaces, 4 spaces). Select according to your team's coding style.
• Validation: An error message is displayed when the input JSON is invalid (syntax error). Keys must be enclosed in double quotes, and trailing commas are not allowed.

Use the "Copy" button to copy the formatted JSON to the clipboard.

• Use Cases
• Formatting and debugging API responses for readability.
• Reviewing and editing configuration files such as package.json and tsconfig.json.