JSON Formatter & Validator Online
Format, validate, and beautify JSON data online for free with our advanced JSON Formatter. Instantly detect errors, improve readability, and debug APIs or structured data in your browser—no installation or registration required. Perfect for developers, data analysts, and anyone working with JSON who values privacy and speed.
About This Tool
Learn what makes this tool special
Key Features
What makes this tool special
- Format and beautify JSON data instantly
- Validate JSON syntax with detailed error messages
- Real-time syntax highlighting and error detection
- Minify JSON to reduce file size
- Collapsible tree view for large JSON structures
- Search and filter functionality within JSON
- Copy formatted JSON to clipboard
- Download formatted JSON as .json file
- 100% browser-based processing - no uploads
- Supports JSON files of unlimited size
- Mobile-friendly responsive design
- No registration or signup required
- Instant processing with no delays
- Advanced error reporting with line numbers
- Pretty printing with customizable indentation
- JSON path navigation and selection
Quick Guide
Master this tool in seconds
- 1Paste your JSON data into the editor or upload a .json file
- 2The tool automatically validates and highlights any syntax errors
- 3Click 'Format' or 'Beautify' to make JSON readable with proper indentation
- 4Use 'Minify' to compress JSON for production use
- 5Expand/collapse sections in tree view for large JSON files
- 6Search for specific keys or values within your JSON
- 7Copy the formatted result or download as a .json file
Common Questions
Everything you need to know
Q.How do I format JSON data?
Simply paste your JSON into the editor. The tool automatically formats it with proper indentation and syntax highlighting.
Q.Can this tool validate JSON?
Yes, it performs real-time validation and highlights syntax errors with detailed messages and line numbers.
Q.Is my JSON data secure?
Absolutely secure. All processing happens locally in your browser. Your JSON never leaves your device.
Q.Can I minify JSON with this tool?
Yes, click the 'Minify' button to compress your JSON by removing whitespace and reducing file size.
Q.Does it support large JSON files?
Yes, there are no file size limits. The tool handles JSON files of any size efficiently.
Q.Can I work with JSON files offline?
Yes, once loaded, the JSON formatter works completely offline with no internet connection required.
Q.What if my JSON has errors?
The tool will highlight errors in red and provide detailed messages explaining what's wrong and where.
Q.Can I download the formatted JSON?
Yes, you can download the formatted or minified JSON as a .json file for saving or sharing.
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