Free JSON Viewer Online

Paste JSON data into the viewer and instantly format, beautify and validate it. This browser-based JSON tool helps developers, students, API users and AI users read messy JSON more easily.

JSON Viewer, Formatter and Validator

Paste JSON to format and validate it.
JSON Input
Formatted JSON Output

What Is This JSON Viewer?

This free JSON viewer lets you paste JSON data and convert it into a clean, readable format. It also validates your JSON and helps identify syntax errors, making it useful for developers, API testing, automation workflows and AI-generated data.

Features

  • Format JSON instantly
  • Validate JSON syntax
  • Beautify messy or compact JSON
  • Minify JSON into a compact format
  • Copy formatted output
  • Runs entirely in your browser
  • No registration required
  • No installation required
  • Free to use

How To Use This JSON Viewer

  1. Paste your JSON data into the input box on the left.
  2. Click Format JSON or allow the tool to format as you type.
  3. Review the formatted JSON output on the right.
  4. If the JSON is invalid, read the error message and correct the issue.
  5. Copy the formatted JSON and use it in your project.

JSON Formatting Example

Before Formatting

{"name":"Example","active":true,"items":["one","two","three"]}

After Formatting

{
  "name": "Example",
  "active": true,
  "items": [
    "one",
    "two",
    "three"
  ]
}

Common Uses For A JSON Viewer

API Testing

Format JSON responses from APIs so they are easier to read and debug.

Power Automate Workflows

Review JSON data used in Microsoft Power Automate and automation processes.

AI-Generated JSON

Paste JSON generated by AI tools and validate whether it is correctly structured.

Configuration Files

Read and clean JSON configuration files used by applications and development tools.

Debugging Data

Find syntax errors, missing commas, broken objects or invalid JSON formatting.

Learning JSON

Students and beginners can understand how JSON objects, arrays and values are structured.

Frequently Asked Questions

What is a JSON viewer?

A JSON viewer is a tool that lets you paste JSON data and view it in a cleaner, formatted and readable structure.

Is this JSON viewer free?

Yes. This JSON viewer is free to use directly in your browser.

Does this tool validate JSON?

Yes. The tool checks whether your JSON is valid and displays an error message if the JSON cannot be parsed.

Does this tool upload my JSON?

No. The JSON formatting and validation happens in your browser using JavaScript.

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