JSON Formatter & Visualizer
Input JSON
Output
How to Use JSON Formatter & Visualizer
Paste Your JSON
Paste raw, minified, or partially formatted JSON into the input area. The tool accepts any valid JSON including objects, arrays, nested structures, and JSON with special characters.
Format or Minify
Click Format / Prettify to produce clean indented JSON with syntax highlighting. Click Minify to strip all whitespace for compact output. Choose your indentation size (2 or 4 spaces).
Explore in Tree or Diagram View
Switch to Tree View to interactively expand and collapse nested nodes. Use Diagram View for a card-based visual layout of deeply nested JSON structures.
Free Online JSON Formatter & Validator
Instantly Format & Validate JSON
Paste raw, minified, or messy JSON and get clean, indented output with syntax highlighting. The tool validates your JSON in real-time and pinpoints syntax errors with descriptive messages so you can fix issues quickly.
Interactive Tree View
Switch to tree view to explore deeply nested JSON structures. Expand and collapse nodes interactively to navigate complex API responses, configuration files, or database records without getting lost in the raw text.
Minify for Production
Compress your JSON by stripping all whitespace, reducing payload size for APIs, configuration files, and data storage. Perfect for optimizing network transfer and embedding data compactly in scripts or HTML.
Common JSON Use Cases
Use the formatter to debug REST API responses, clean up configuration files (package.json, tsconfig.json), inspect third-party data feeds, format data before storing in a database, or verify that your server responses match your expected data structure.
Frequently Asked Questions about JSON Formatter
Paste your raw or minified JSON into the input area and click "Format." The tool instantly prettifies it with proper indentation, syntax highlighting, and collapsible sections for easy reading.
Yes. Switch to "Minify" mode to compress your JSON by removing all unnecessary whitespace. This is ideal for reducing payload size in APIs and configuration files.
Absolutely. The tool automatically detects and highlights syntax errors such as missing commas, mismatched brackets, or trailing commas, showing the exact line and position of each error.
Yes. Toggle the tree view to see a hierarchical, collapsible representation of your JSON data. This makes it easy to explore deeply nested objects and arrays.
All formatting and validation happens locally in your browser using JavaScript. Your data is never uploaded to any server, ensuring complete privacy and security.