JSON Viewer & Formatter Online

Free online JSON Formatter & Viewer. Format, validate, Edit, Search and Replace JSON data with syntax highlighting and interactive features

JSON Input
Paste your JSON data, upload a file, or try a sample

Drag & drop your JSON file here

or click to browse files

Supports .json files up to 100MB with drag & drop

Formatted JSON
Pretty-printed JSON with syntax highlighting

No JSON to display

Enter JSON data in the input area to see the formatted output

Actions
Copy, download, and manage your JSON data

Copy to Clipboard

Download as File

Reset

Free Online JSON Formatter & Viewer

Use our free JSON Formatter & Viewer to format, validate, and beautify JSON data instantly. Whether you're working with API responses, large JSON files, or minified data, this tool helps you pretty-print JSON, explore it in a tree view, and debug errors quickly. No sign-up required — fast, secure, and 100% free.

Features of Our JSON Formatter

Formatting

  • Instant JSON formatting and pretty-print
  • Validate and highlight syntax errors
  • Minify JSON for compact storage

Tree & Navigation

  • Tree view and collapsible JSON structure
  • Search and filter within JSON data
  • Expand/collapse all nodes

File Handling

  • Upload large JSON files (up to 100MB)
  • Drag & drop JSON files
  • Copy, download, or share formatted JSON

How to Use the JSON Formatter & Viewer

  1. Paste your JSON code into the editor or drag & drop a file.
  2. Click “Format JSON” to pretty-print and validate instantly.
  3. Explore data in tree view or raw text mode.
  4. Copy or download the formatted JSON for your project.

Why Choose This JSON Formatter?

Unlike other online tools, our JSON Formatter & Viewer is built for developers handling large JSON files. It’s lightweight, runs in your browser, and ensures data never leaves your device. Perfect for debugging APIs and working with complex JSON structures.

Frequently Asked Questions

What is a JSON Formatter?

A JSON Formatter is a tool that takes minified or raw JSON and makes it readable by adding indentation, line breaks, and syntax highlighting.

Is this JSON Formatter free?

Yes, it’s 100% free and works directly in your browser.

Can I format large JSON files?

Yes, you can upload and format JSON files up to 100MB.

Does this tool validate JSON?

Yes, it checks for errors and highlights invalid JSON so you can fix mistakes quickly.

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