How to Use JSON Hero: A Powerful JSON Viewer for Developers

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

It supports multiple views such as column view, tree view, and raw JSON view; the column view is inspired by macOS Finder.

1. Local Installation (Optional)

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

npm start

2. Direct Use

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

JSON URL

Tree View

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

You can also search within the JSON data.

When 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 multiple viewing modes and extensions such as VS Code, making it a powerful tool for anyone who works with JSON regularly.