JSON Hero: A Simple and Powerful JSON Viewer and Editor

JSON Hero is a simple yet powerful JSON utility that, through an elegant UI and enhanced features, makes reading and understanding JSON documents easier and more intuitive.

It supports multiple viewing modes—including column view, tree view, and raw JSON view—to accommodate different inspection needs; the column view is inspired by macOS Finder.

Installation

To run JSON Hero locally, clone the repository and install its dependencies:

git clone https://github.com/jsonhero-io/jsonhero-web.git
cd jsonhero-web
npm install

Then start the application with:

npm start

After launching, open http://localhost:8787 in a browser.

Usage

Visit https://jsonhero.io/ and drag a JSON file onto the site, or paste JSON or a JSON URL into the provided form.

The tool automatically infers the content of strings and provides useful previews and attributes for selected values, such as date‑time, image URLs, website URLs, and JSON URLs.

It also offers a tree view that clearly displays the hierarchical structure of JSON data, and supports searching within the JSON.

Sharing

After editing or reviewing data, you can generate a shareable link instead of copying the entire dataset, which is convenient for front‑end developers.

Overall, JSON Hero supports various ways to view JSON data, integrates with VS Code extensions, and is a valuable tool for anyone who frequently handles JSON.