JTA Beta

JSON Formatter

Format, validate, minify, and beautify your JSON data with syntax highlighting

0 chars•0 lines•0.00 KB
Input
Output

What is JSON Viewer?

Our free online JSON Viewer helps developers visualize, navigate, and format JSON data with ease. It supports expanding/collapsing nodes, syntax highlighting, error detection, and pretty formatting — making it perfect for debugging, reading API responses, or analyzing large JSON files.

Tree View Explorer

Expand and collapse JSON nodes for clean navigation and quick understanding.

Error Detection

Automatically highlights invalid JSON and helps fix syntax errors instantly.

Pretty & Minified View

Beautify or minify JSON data with one click for easy readability or compact output.

Why Use JSON Viewer?

1

Make JSON Easy to Understand

Raw JSON is hard to read. Our viewer formats it into a visually structured tree so you can instantly understand the data.

2

Debug Faster

Quickly spot missing commas, invalid brackets, or malformed JSON. The tool highlights errors before your code breaks.

3

Handle Big JSON Files

The viewer supports large and deeply nested JSON structures, making it ideal for API responses, log files, and debug data.

4

Perfect for Developers & API Testing

Whether you’re working with REST APIs, config files, or large datasets — this tool helps you view and analyze JSON instantly.

How to Use the JSON Viewer

1

Paste or Upload JSON

Paste JSON directly into the editor or upload a .json file from your device. 

{"user": {"name": "Sourav", "role": "Developer"}}
2

The tool automatically formats your data into an expandable tree structure with syntax highlighting.

The tool automatically generates a TypeScript interface in the right panel. It detects types, handles nested objects, and creates proper interface names. 

user: {
  name: "Sourav",
  role: "Developer"
}
3

Copy or Download

Copy the formatted JSON or download it as a file for reuse in your projects.

Pro Tips

  • •Use the tree view to quickly navigate nested objects and arrays.
  • •Click “Beautify” to instantly format messy or minified JSON.
  • •Use “Minify” to compress JSON for faster transmission or storage.
  • •Supports both light and dark modes for better readability.

Frequently Asked Questions

Is my JSON data safe and private?
Yes! All JSON viewing, formatting, and parsing happens entirely in your browser. Your data is never uploaded, stored, or sent to any server. This makes the JSON Viewer 100% safe, secure, and private—even works offline after loading the page.
Can the JSON Viewer handle large JSON files?
Absolutely. Our JSON Viewer can process large and deeply nested JSON structures. However, extremely large files (10MB+) may slow down your browser because all processing is done client-side. For best performance, use files under 5MB.
Does it support nested objects and arrays?
Yes! The viewer fully supports complex and deeply nested JSON data. You can expand and collapse objects, arrays, and sub-trees for easy navigation and understanding.
Can I format or minify JSON?
Definitely. The tool includes built-in options to beautify, format, or minify JSON with a single click. It's perfect for cleaning messy JSON or compressing data for APIs and storage.
Does the JSON Viewer detect invalid JSON?
Yes. If your JSON contains syntax errors—missing commas, extra brackets, invalid quotes—the tool highlights the issue instantly so you can fix it quickly.
Can I upload JSON files?
Yes! You can upload any .json file directly from your device. The viewer will instantly format and display it in a structured tree view.
Can I use this JSON Viewer with APIs?
Yes. Simply paste the JSON response from any REST API into the viewer to explore it. This makes it great for debugging API responses and analyzing data structures.
Do I need to install anything?
No setup or installation required! The JSON Viewer runs directly in your browser—no extensions, no downloads, no dependencies. Just open the page and paste your JSON.
Is this tool really free?
Yes! JSONToAll is completely free to use with no hidden fees, registration requirements, or usage limits. All processing happens in your browser, so we don't even store your data.
Is my data safe and private?
Absolutely! All conversion happens entirely in your browser using JavaScript. Your data never leaves your device or gets sent to our servers. You can even use this tool offline once the page loads.
Do I need to install anything?
No installation required! This is a browser-based tool that works instantly. Just visit the page, use the tool, and you're done. No downloads, no setup, no configuration needed.
Can I use this for large files?
Yes! The tool can handle large and complex data structures. However, extremely large files (10MB+) might slow down your browser since all processing happens client-side. For best performance, use files under 5MB.

Ready to View and Explore Your JSON Instantly?

Format, validate, and explore your JSON data in a beautiful tree view. Perfect for debugging APIs, reading complex data structures, and cleaning messy JSON—all directly in your browser.