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JSON Formatter & Validator
Beautify, validate, minify, and format JSON instantly — 100% free, no signup
Start Formatting JSON Free
🔒 No signup required · Your JSON is processed locally & never stored
Enter Your JSON
Your JSON is processed locally in your browser and never stored or shared on our servers.
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Processing JSON...
JSON Statistics
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Status
✅ Validation Result
Enter JSON to validate
Formatted Output
Formatted JSON
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// Formatted JSON will appear here...
// Paste your JSON in the input box above and click "Format JSON"Advertisement
This free online JSON Formatter & Validator tool helps you format, validate, and analyze JSON data instantly. Easily beautify messy or minified JSON into a clean, readable structure, check syntax errors, and prepare optimized JSON for production use. Designed for developers, API integrators, web designers, and data analysts, this tool simplifies working with complex JSON data directly in your browser with no signup required. It also provides useful insights into JSON structure, making debugging and data handling faster and more efficient. Whether you are testing APIs, reviewing responses, or organizing data, this tool ensures your JSON is accurate, well-formatted, and ready to use.
Key Features:
- Smart Formatting: Beautify JSON with customizable indentation (2, 4, 8 spaces or tabs)
- Real-time Validation: Instant syntax checking with detailed error messages
- Minification: Compress JSON by removing all whitespace for production use
- JSON Statistics: Detailed analysis of size, depth, key count, and structure
- File Support: Upload .json, .txt, .js, and .csv files directly
- Privacy Focused: Your JSON is processed locally in your browser
- Export Options: Download as .json, .txt, or CSV formats
- Tree View: Visual hierarchical display of JSON structure
How to Use This JSON Formatter
1
Paste or Upload JSON
Copy and paste your JSON code into the input box, or upload a .json/.txt file using the upload button.
2
Format & Validate
Click "Format JSON" to beautify your code, or "Validate" to check for syntax errors automatically.
3
Customize Output
Adjust indentation (2/4/8 spaces or tabs), choose quote style, and toggle tree view for better visualization.
4
Export & Save
Copy formatted JSON to clipboard, download as .json file, or export to CSV for data analysis.
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Frequently Asked Questions
Yes, our JSON Formatter & Validator tool is completely free with no hidden charges. There are no usage limits, no registration required, and no premium features locked behind paywalls. You can format, validate, and minify unlimited JSON documents without any restrictions.
No, your JSON data is processed locally in your browser. We don't store or transmit your JSON to our servers, ensuring complete privacy and security. This also means you can use the tool offline once the page is loaded.
There's no strict limit, but for optimal performance, we recommend keeping JSON under 10MB. The tool can handle large JSON files but may slow down with extremely complex or deeply nested structures. For best results, keep files under 1MB.
You can upload .json, .txt, .js, and .csv files directly. The tool will extract and analyze the JSON content automatically. For CSV files, the tool will attempt to convert the data to JSON format for formatting and analysis.
Yes! You can choose between double quotes (standard JSON) and single quotes using the quote style selector. However, note that single quotes are not valid in strict JSON, but our tool can handle them for JavaScript-style objects.
The validator will detect and highlight syntax errors with detailed error messages, including line numbers and specific issues. The tool will show you exactly where the problem is and suggest fixes for common errors like missing commas, brackets, or quotes.