JSON Formatter

Features

Format, validate, and minify JSON instantly in your browser. Paste your JSON and get beautifully formatted output with syntax highlighting, error detection, and one-click minification — all without uploading your data.

When You Need This

Common pain points this tool solves

1. Format messy JSON API responses for debugging
2. Validate JSON configuration files before deployment
3. Minify JSON for production performance optimization
4. Compare two JSON files by formatting them side by side

How to Use

Step-by-step instructions

1. Paste your raw JSON, NDJSON or YAML snippet into the left input, or drag and drop a .json/.yaml file.
2. Press Format to pretty-print with 2-space indent, JSONP to unwrap callback wrappers, or Validate to get errors with column and line numbers.
3. Use the tree view to expand or collapse nested objects and arrays, or copy the tree node you need.
4. Switch to Minify mode for one-line output or Download to save the result back to disk.

Why Choose Korelyy

What makes us better

1. Real-time validation with line-level error highlighting
2. Supports format, minify, sort keys, and JSON-to-XML conversion
3. Handles large JSON files (up to 5MB) without lag
4. No server upload — all processing happens in the browser
5. Share formatted output via URL encoding of the JSON content

Monetize With This Tool

Turn this tool into a side income stream

1. Use this tool to speed up your freelance work and take on more paying clients
2. Create polished content faster for your blog, YouTube channel, or social media and grow your audience
3. Offer this tool's capabilities as a service on Fiverr, Upwork, or to your local business clients

Frequently Asked Questions

1. Is JSON Formatter free to use?

   Yes. JSON Formatter is 100% free for core features — no signup, no watermarks, no hidden paywalls on the tools you need day to day.

2. Do I need to sign up to use JSON Formatter?

   No. Open and use instantly in your browser. Nothing to install, no account required. Your preferences stay on your device.

3. Is my data safe with JSON Formatter?

   Yes. JSON Formatter runs locally in your browser whenever technically possible — sensitive inputs are processed on your device, not on our servers. No tracking cookies.

4. Which devices does JSON Formatter work on?

   Phones, tablets and desktops with any modern browser (Chrome, Safari, Edge, Firefox). Touch-friendly and responsive from 320px to 4K.

5. Is my JSON data ever sent to a server?

   No. All JSON parsing, formatting, and validation happens entirely in your browser. Nothing is uploaded to any server. Your data stays private on your machine.

6. What is the maximum JSON file size I can format?

   The tool can handle files up to several megabytes, limited only by your browser memory. For very large files, we recommend using the tree view instead of full syntax highlighting for better performance.

7. Can I collapse and expand nested JSON objects?

   Yes, the tree view allows you to collapse or expand nested objects and arrays with a single click. This makes it easy to navigate complex JSON structures with hundreds of nested fields.

8. Does this tool validate JSON while I type?

   Yes, real-time validation with error highlighting. If your JSON is invalid, the tool shows the exact line and character position of the error, along with a helpful error message.