JSON Formatter & Validator
Format, validate, escape, and explore your JSON data with our comprehensive online tool. Features interactive tree view and collapsible nodes for better JSON visualization.
JSON Formatter & Validator
Format, validate, escape, and explore your JSON data
Input JSON
Formatted JSON
Why Use Our JSON Formatter?
Complete JSON toolkit with formatting, validation, escaping, and interactive visualization
Format & Beautify
Transform minified JSON into readable, properly indented format with customizable spacing
Validate JSON
Instantly validate JSON syntax and get detailed error messages for debugging
Interactive Tree View
Explore JSON structure with collapsible nodes, making complex data easy to navigate
Escape & Unescape
Convert JSON to escaped strings for embedding in code or unescape JSON from strings
Minify & Compress
Remove unnecessary whitespace and reduce JSON file size for production use
Privacy Focused
All processing happens locally in your browser - no data is transmitted to servers
File Upload
Upload JSON files directly or paste content from clipboard for quick processing
Export Results
Download formatted JSON files or copy results to clipboard with one click
JSON Best Practices
Follow these guidelines for clean, maintainable JSON
✅ Good Practices
- • Use descriptive property names
- • Keep consistent naming conventions (camelCase or snake_case)
- • Validate JSON before using in production
- • Use proper data types (numbers, booleans, arrays)
- • Format for readability during development
- • Minify for production to reduce bandwidth
❌ Common Mistakes
- • Using single quotes instead of double quotes
- • Adding trailing commas after last elements
- • Including comments (not supported in JSON)
- • Using undefined or function values
- • Forgetting to escape special characters
- • Having duplicate keys in objects
Frequently Asked Questions
What is JSON and why do I need to format it?
JSON (JavaScript Object Notation) is a lightweight data interchange format. Formatting makes JSON readable by adding proper indentation and line breaks, which is essential for debugging and development.
Is my JSON data safe when using this tool?
Yes, absolutely! All JSON processing happens locally in your browser. No data is ever transmitted to our servers or stored anywhere. Your data remains completely private.
What's the difference between formatting and minifying JSON?
Formatting adds whitespace and indentation for readability, while minifying removes all unnecessary whitespace to reduce file size. Use formatting for development and minifying for production.
Can I upload large JSON files?
Yes, you can upload JSON files of various sizes. However, very large files might take longer to process depending on your browser and device performance.
How do I fix JSON validation errors?
Our validator provides specific error messages pointing to the issue. Common fixes include adding missing quotes, removing trailing commas, and ensuring proper bracket/brace matching.
What is the JSON tree view and how do I use it?
The interactive tree view displays JSON data as a collapsible hierarchical structure. Click on objects and arrays to expand/collapse them. Use 'Expand All' or 'Collapse All' buttons for quick navigation of complex JSON structures.
When should I use escape/unescape functions?
Use escape when you need to embed JSON as a string in code or configuration files. Use unescape when you have JSON data stored as an escaped string that you want to format and read normally.
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