API Development
Validate and format JSON responses from APIs, debug data structures, and convert to TypeScript interfaces.
JSON Editor
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Developer Tools
Validate and format JSON responses from APIs, debug data structures, and convert to TypeScript interfaces.
Explore complex JSON datasets with tree view, search functionality, and export to CSV or Excel for analysis.
Format and validate JSON configuration files, sort keys for consistency, and minify for production.
Format, validate, beautify, and transform JSON data instantly. Real-time validation, syntax highlighting, tree visualization, and conversion to TypeScript, Python, CSV, and Excel. All processing happens in your browser - your data never leaves your device.
Using our JSON Viewer and Editor is simple and powerful. Follow these easy steps to format, validate, and transform your JSON data in seconds.
Paste your JSON data directly into the editor, or upload a JSON file from your device. The tool accepts JSON from APIs, configuration files, or any valid JSON source.
The tool automatically validates your JSON as you type. Syntax errors are highlighted immediately with clear error messages showing the line number and specific issue.
Click the "Format" button to automatically indent and structure your JSON for better readability. You can also minify JSON to remove all whitespace for production use.
Switch to the tree view to explore complex JSON structures visually. Expand and collapse nodes to navigate nested data easily.
Transform your JSON into various formats: TypeScript interfaces, Python dictionaries, CSV, or Excel files for reporting.
Download your processed JSON as a file, or copy it to your clipboard with one click. All processing happens in your browser.
Use the search feature to quickly find specific keys or values
Sort keys alphabetically for consistent formatting
Take advantage of keyboard shortcuts for faster workflow
Use tree view for complex nested structures
Want more detailed tutorials?
Visit our blogFind answers to common questions about using our JSON Viewer and Editor
To format JSON, paste your JSON data into the editor and click the "Format" button in the toolbar. The tool will automatically indent and structure your JSON for better readability. You can also use keyboard shortcut Ctrl/Cmd + B.
JSON validation happens automatically in real-time as you type. The tool highlights syntax errors and displays error messages with line numbers. Invalid JSON will show a red error indicator with details about what needs to be fixed.
Click the "Copy as TypeScript" button in the toolbar to generate TypeScript interfaces from your JSON data. The tool automatically creates interfaces with proper types based on your JSON structure. You can then paste the generated TypeScript code into your project.
Use the "Download as CSV" or "Download as Excel" buttons in the toolbar. The tool automatically converts your JSON data into the selected format. For nested JSON structures, the data will be flattened appropriately for spreadsheet compatibility.
Yes, all JSON processing happens entirely in your browser. Your data is never sent to our servers, ensuring complete privacy and security. No data is stored, logged, or transmitted. Everything runs locally on your device.
The tool can handle JSON files up to several megabytes in size. However, very large files may take longer to process. For optimal performance, we recommend files under 10MB. The exact limit depends on your browser's available memory.
Click the "Tree View" tab (or switch on mobile) to see your JSON data in an interactive tree structure. You can expand and collapse nodes, search for specific keys or values, and navigate complex nested structures easily. The tree view is especially useful for large JSON files.
The tool supports several keyboard shortcuts: Ctrl/Cmd + B to format, Ctrl/Cmd + M to minify, Ctrl/Cmd + S to download, Ctrl/Cmd + K to sort keys, Ctrl/Cmd + F to focus search, and Ctrl/Cmd + V to paste and replace content.
Yes, the tool has full dark mode support. Click the theme toggle button in the header to switch between light and dark modes. Your preference is saved and will persist across sessions.
Yes, the JSON Viewer is fully responsive and works on mobile devices. On mobile, the editor and tree view are displayed in a tabbed interface for better usability. All features are available on mobile, including formatting, validation, and conversion.
Click the "Minify" button in the toolbar or use the keyboard shortcut Ctrl/Cmd + M. This removes all unnecessary whitespace and formatting, making your JSON more compact for production use or API responses.
Yes, click the "Copy as Python" button in the toolbar to generate Python code from your JSON data. The tool creates Python dictionaries and data structures that match your JSON structure, ready to use in your Python projects.
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