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JSONPro Documentation

JSONPro (JSON Formatter & Validator) is a high-performance utility designed for developers who need to inspect complex JSON payloads without compromising security. It features advanced tree-view navigation, schema simplification, and multi-format conversion tools. Open JSONPro.

Privacy-First Architecture

Traditional online formatters often log your inputs for "analytics" or debugging. JSONPro takes a different approach:

  • No Backend: There is no API endpoint that receives your JSON.
  • Worker Processing: Large files are processed using Web Workers to ensure your UI remains responsive.
  • Local History: Undo/Redo states are stored in temporary RAM, not in persistent browser storage like LocalStorage.

Key Features

  • Live Validation: Get instant feedback on syntax errors with line-number highlighting.
  • Indentation Control: Toggle between 2 spaces, 4 spaces, or Tabs for your preferred code style.
  • Minification: Strip all whitespace to generate a compact payload ready for production APIs.
  • Tree View: Navigate deeply nested objects with a collapsible UI that makes exploring large configurations easy.

Structural Analysis & Simplification

When dealing with massive API responses (e.g., 50MB+ JSON files), finding the schema can be difficult. JSONPro provides two unique tools for this:

  1. Simplify: This tool scans your JSON for arrays and reduces them to their first element. This allows you to see the "shape" of the data without scrolling through thousands of repeated items.
  2. Analytics: Provides a breakdown of the dataset, including deep nesting levels, total keys, and value distributions.

Exports & Conversions

Transform your JSON data into other formats instantly:

  • YAML/XML: Classic conversion for config files.
  • CSV/Excel: Flattens simple JSON arrays into table-ready formats.
  • TypeScript: Generates an Interface or Type definition based on your JSON structure.

Frequently Asked Questions

Can I load files from disk?
Yes. You can drag and drop a .json file directly into the editor area to load its contents.

What is the maximum file size?
While the browser can technically handle hundreds of megabytes, performance is best for files under 50MB. Beyond that, the syntax highlighting engine may slow down.

Visualize your data correctly

Use JSONPro to inspect, clean, and convert your API responses securely.

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