JSON Formatter & Tree Viewer
Beautify, minify, validate, and explore your JSON data with a collapsible tree view and exact error detection.
Formatted JSON will appear here...
How to use the JSON Formatter?
- Paste your raw, minified, or messy JSON code into the left input box.
- Click the "Format JSON" button to instantly beautify the code with proper indentation.
- Switch to the "Tree View" tab to explore nested data and arrays visually.
- If your code has an error, read the exact line number provided in the output box.
- Click "Copy Output" to paste the clean JSON directly into your IDE or project.
Frequently Asked Questions (FAQ)
Is my JSON data sent to a server?
No. All formatting and validation happen locally in your browser. Your API payloads and configuration files are 100% private.
Does it fix syntax errors automatically?
It does not fix them automatically, but it highlights exactly where the missing comma or bracket is located by giving you the exact line number.
About the JSON Formatter & Tree Viewer
The JSON Formatter & Tree Viewer by Grab-Kit is a free online tool designed for developers, programmers, and data analysts. JSON (JavaScript Object Notation) is the standard format for data exchange on the web, but raw JSON is often minified to save bandwidth, making it extremely difficult to read. Our tool instantly beautifies your code, adding proper indentation and syntax highlighting to make it easily readable.
Using the formatter is incredibly simple. Paste your raw JSON data into the left input box and click "Format JSON". The tool will validate your code, and if it's correct, it will display the beautified, color-coded version on the right. If there's a syntax error like a missing comma or bracket, the tool will tell you exactly on which line the error occurred. For deeply nested JSON objects, you can switch to the "Tree View" tab to explore the data as a collapsible tree, making it easy to find the exact key or value you are looking for. You can also use the "Minify" button to remove all unnecessary whitespace for production environments.
Why use Grab-Kit?
All our tools, including the JSON Formatter, run entirely in your browser. This means your data is never uploaded to any server, ensuring 100% privacy and security for your sensitive API payloads or configuration files. It is completely free, requires no signup, and works flawlessly on both desktop and mobile devices.