json formatter & validator

Paste your raw JSON to format, pretty print, and validate it.

How It Works

1. Paste Your JSON

Enter your raw JSON data into the text area.

2. Format & Validate

Click the button to instantly format and validate your JSON.

3. Copy Result

Copy the pretty-printed JSON or view validation errors.

Why Use OnlineTinker's JSON Formatter?

Our free online JSON Formatter and Validator is an indispensable tool for developers, data analysts, and anyone working with JSON data. It helps you quickly make sense of complex JSON structures, identify errors, and ensure data integrity. It's fast, private, and easy to use. JSON has become the standard for data interchange on the web, and our tool is designed to make working with it as simple as possible.

Whether you are debugging an API response, creating a configuration file, or just trying to understand a complex JSON structure, our formatter can help. It will take any valid JSON and pretty-print it, making it easy to read and understand. The validator will check for syntax errors and provide helpful feedback so you can quickly fix any issues.

  • Pretty Print: Formats messy JSON into a readable, indented structure.
  • Instant Validation: Quickly checks for syntax errors and invalid JSON.
  • Completely Free: No costs, no subscriptions, no limits.
  • Privacy-Focused: Your data is processed on the fly and not stored.

Perfect For:

  • Developers: Debug API responses, configure applications, or manage data.
  • Data Scientists: Clean and inspect JSON datasets.
  • Testers: Validate JSON payloads in API testing.
  • Anyone working with JSON: Quickly understand and verify JSON structures.

Frequently Asked Questions (FAQs)

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.

How does this tool validate JSON?

The tool attempts to parse your input as JSON. If successful, it's valid. If not, it provides an error message indicating where the syntax issue might be.

Is this tool free to use?

Yes, our JSON Formatter and Validator is completely free to use, with no hidden costs or subscriptions.

Do I need to install any software?

No, our tool is entirely web-based. You can access it directly from your browser on any device without needing to download or install anything.

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