Free JSON Formatter & Validator Tool

JSON Formatter & Validator

Status: Awaiting Input

What is the JSON Formatter & Validator?

This is a 2-in-1 tool for developers and data analysts. A JSON Formatter (also known as a "Pretty Printer") takes compressed, unreadable JSON data and adds indentation and line breaks to make it easy for humans to read. A JSON Validator checks the code to ensure it follows the strict syntax rules of JSON, catching errors like missing commas or brackets.

How to Use This Tool

1. Paste Your JSON: Copy your raw JSON data and paste it into the text box above.
2. Click "Format & Validate": The tool will perform two actions at once:
   • The "Status" bar will tell you if your JSON is Valid or Invalid. If it's invalid, it will provide an error message.
   • If the JSON is valid, the formatted, easy-to-read version will appear in the output box below.

After working with your data, you might need to clean up the presentation layer. You can use our HTML Tag Cleaner to strip out messy code from your web pages.

Why is This Tool Important?

• Debugging: When you get a long, single-line JSON response from an API, it is nearly impossible to read. Formatting it allows you to see the nested structure and find the data you are looking for quickly.
• Error Detection: A missing comma or a mismatched bracket can break your entire application. The validator instantly points out these syntax errors so you can fix them before they cause problems.
• Learning: For those new to JSON, this tool helps you understand its structure by visualizing how keys, values, objects, and arrays are organized.

FAQ

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 has become the standard format for transmitting data between a server and a web application.

Can this tool fix my broken JSON?

No, it can only identify the error. For example, it will tell you "Unexpected token..." near a missing comma, but you must add the comma manually in the input box and re-validate.

For more free developer and data tools, visit Smarter Insights.