Online JSON Viewer, Formatter & Validator
Instantly view, format, validate, and edit JSON online with our powerful JSON Viewer. Paste JSON, upload files, prettify messy data, fix syntax errors, and explore structures in a clean tree view with collapsible nodes. Built for developers, analysts, and API debugging.
Why Use This JSON Viewer Tool?
JSON Tree Viewer
Explore JSON visually with expandable and collapsible nodes for better readability.
Instant JSON Formatter
Prettify or beautify JSON with proper indentation and structured formatting.
JSON Validator
Detect syntax errors in real time and quickly fix invalid JSON data.
Edit JSON Online
Modify keys, values, arrays, and objects directly in the editor interface.
Large File Support
Handle big JSON responses from APIs, logs, and datasets efficiently.
100% Private & Secure
Everything runs in your browser. No JSON data is uploaded to any server.
Common JSON Viewer Use Cases
- ✔ Debug API responses
- ✔ Validate JSON before database import
- ✔ Format messy JSON from logs
- ✔ Explore nested JSON structures
- ✔ Edit configuration files
- ✔ Convert minified JSON into readable format
JSON Tools Comparison
| Feature | This JSON Viewer | Basic Formatter |
|---|---|---|
| Tree View | ✔ Yes | ❌ No |
| Syntax Validation | ✔ Real-time | ⚠ Limited |
| Editing Support | ✔ Inline Editing | ❌ Read-only |
| Large File Handling | ✔ Optimized | ❌ Slow |
JSON Viewer & Formatter FAQs
What is a JSON Viewer?
A JSON Viewer is a tool that displays JSON data in a readable, structured tree format, making it easier to explore nested objects and arrays.
How do I format JSON online?
Paste your JSON data and click format. The tool will automatically beautify the JSON with proper indentation and structure.
Can I validate JSON with this tool?
Yes. The JSON validator checks for syntax errors and highlights problems so you can fix them instantly.
Is my JSON data uploaded to a server?
No. All processing happens locally in your browser to ensure complete privacy and security.
Can I edit JSON here?
Yes, you can directly modify keys and values inside the editor interface before downloading or copying the result.
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