What is JSON?
A JSON viewer displays your JSON as an interactive, collapsible tree, making large or deeply nested data easy to explore. Instead of scrolling through raw text, you can expand and collapse objects and arrays to focus on the parts you care about. This tool renders the tree instantly and privately in your browser.
Runs locally: your JSON is parsed and displayed in your browser; nothing is uploaded.
How JSON works
The viewer turns JSON into a navigable tree:
- The JSON is parsed into objects, arrays and values.
- Each object and array becomes an expandable node.
- You can collapse branches to hide detail and expand only what you need.
How to use
- Paste your JSON into the input box.
- The tool processes it instantly in your browser.
- Copy the result.
Options explained
- Expand / collapse — Open or close nested objects and arrays to navigate large data.
- Pretty Display — Toggle the formatted tree view.
Common uses
- Exploring large API responses.
- Debugging deeply nested configuration.
- Understanding the structure of unfamiliar JSON.
Frequently asked questions
What is a JSON viewer for?
Browsing and understanding large or nested JSON without reading raw text.
Is my JSON uploaded?
No, it is parsed and displayed entirely in your browser.
What if the JSON is invalid?
The viewer needs valid JSON; use the JSON Validator to find and fix errors first.