Features
Everything you need to work with JSON, all in one powerful tool.
All JSON processing happens instantly in your browser. No server round-trips, no waiting. Format, validate, and transform megabytes of JSON in milliseconds.
Your data never leaves your device. Unlike other tools, we don't upload your JSON to any server. Perfect for sensitive or proprietary data.
All Features
As you type, our validator checks your JSON syntax and displays errors instantly. See exactly which line has the issue and what's wrong.
Explore complex JSON structures visually with our collapsible tree view. Expand and collapse nested objects and arrays to understand your data.
Fix common JSON errors automatically. Our repair tool handles trailing commas, single quotes, unquoted keys, and undefined values.
Transform minified or messy JSON into clean, properly indented code. Customizable indentation with 2-space formatting by default.
Compress your JSON by removing all unnecessary whitespace. Perfect for reducing payload sizes in APIs and configuration files.
Drag and drop JSON files directly into the editor, or use the upload button. Support for .json, .txt, and other text files.
Fetch JSON directly from any public URL or API endpoint. Great for debugging API responses without leaving the tool.
Export your formatted or minified JSON as a downloadable file. One click to save your work locally.
Copy formatted JSON to your clipboard instantly. Visual feedback confirms the copy was successful.
Easy on the eyes with full dark mode support. Theme automatically matches your system preference or toggle manually.
Why Choose Our Tool?
| Feature | ToolNett | Others |
|---|---|---|
| Client-side processing | Yes | Sometimes |
| No data uploaded | Yes | No |
| Auto-repair errors | Yes | Rare |
| Tree view | Yes | Sometimes |
| URL loading | Yes | Rare |
| Free forever | Yes | Varies |
Ready to Try?
Start formatting and validating JSON in seconds.
Open JSON Formatter