JSON Formatter & Validator

How to Use the JSON Formatter

This JSON formatter tool lets you pretty-print, minify, and validate JSON (JavaScript Object Notation) data online. Paste your JSON data into the input field and click the "Format" button to convert it into readable, indented JSON. You can choose between 2-space, 4-space, or tab indentation. Click "Minify" to remove all whitespace and newlines for the smallest possible JSON output. This is useful for checking API responses and organizing data.

What is JSON?

JSON (JavaScript Object Notation) is a lightweight data interchange format. It is easy for humans to read and write, and easy for machines to parse and generate. It is the de facto standard for Web API request/response data formats and is also used in configuration files (package.json, tsconfig.json, etc.). Basic JSON data types include string, number, boolean, null, object, and array. JSON syntax rules require keys to be enclosed in double quotes, trailing commas are not allowed, and comments are not supported in standard JSON.

Frequently Asked Questions (FAQ)

Q. Can it handle large JSON files?

A. It can handle typical JSON data (up to about 1MB) without issues. All processing is done in your browser, so no data is ever sent to a server.

Q. What are common causes of JSON syntax errors?

A. Common causes include trailing commas, single quotes (only double quotes are valid in JSON), unquoted keys, and comments. The validation feature can help you locate errors.

Q. Is my input data safe?

A. Yes, it is safe. All processing is completed within your browser, and input data is never sent to any server.