JSON Hero – A Lightweight JSON Viewer with Multiple Views and Local Installation Guide

JSON Hero is a simple and practical JSON tool with a clean UI and extra features that make reading and understanding JSON documents easier and more intuitive.

It supports multiple viewing modes—including column view (inspired by macOS Finder), tree view, and raw JSON view—to help users explore JSON data from different perspectives.

1 Local Installation (optional)

To run JSON Hero locally, first clone the source code and install the required dependencies:

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

Then start the application and open http://localhost:8787 in a browser:

npm start

2 Direct Use

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

Content Preview

JSON Hero automatically infers the content of strings and provides useful previews and properties for selected values.

Date and Time

Image URL

Website URL

Tree View

The tree view presents JSON data in a clear hierarchical structure.

JSON Hero also supports searching within JSON data.

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

Overall, JSON Hero supports multiple views for JSON data, integrates with extensions like VS Code, and is a powerful tool for anyone who frequently works with JSON.