JSON Master
Validate, Format, and Visualize JSON data with a professional tree view.
Ready to process
Why Use This JSON Formatter?
Validate & Fix JSON
Instantly check if your JSON is valid. The tool highlights errors and offers quick fixes for common syntax issues like missing quotes.
Interactive Tree View
Navigate complex nested JSON data easily. Expand and collapse nodes, and see data types (string, number, boolean) color-coded for clarity.
Search & Filter
Quickly find keys or values within massive JSON files using the built-in search. Matches are highlighted and auto-expanded.
Secure Client-Side Processing
Your data never leaves your browser. Validation and formatting happen locally in JavaScript, ensuring 100% privacy.
How to Format & Minify JSON
- Paste Your JSON: Copy your raw JSON string and paste it into the left editor panel. You
can also upload a
.jsonfile. - Format: Click the "Format & Validate" button. The tool will prettify the code and display the interactive tree view on the right.
- Search: Use the search icon in the result tab to find specific data points within your JSON structure.
- Minify (Optional): Click "Minify" to remove whitespace and compress the JSON for production use.
{"name":"John","age":30}
{
"name": "John",
"age": 30
}
Frequently Asked Questions
Is the JSON formatting secure?
Yes. We do not store or transmit your JSON data. All processing is performed locally in your web browser.
Can I format invalid JSON?
The tool attempts to parse your input. If it detects errors (like trailing commas), it will show an error message. We are working on an auto-fix feature!
What is the "Minify" option?
Minifying removes all unnecessary whitespace, newlines, and indentation, making the JSON string as small as possible for efficient transmission.
Does it support large files?
Yes! The tool is optimized for performance and can handle large JSON objects. For very large files, use the "Fullscreen" mode for a better viewing experience.
Esc to exit.