Open JSON Files Online
JSON is a plain-text format for structured data: objects with keys and values, arrays, strings, numbers, true, false and null. APIs, config files and exports from countless apps use it.
JavaScript Object Notation · .json
What you see in the JSON viewer
- A collapsible tree with type and item counts, plus a search filter
- Syntax errors at the exact line and column, including trailing commas and duplicate keys
- A sortable table view for arrays of objects
- One-click format or minify, and copy any value or path like $.items[3].name
Other ways to open JSON files
Windows
Notepad or VS Code open JSON as text; Firefox shows a readable tree when you drag the file into it.
macOS
TextEdit shows the raw text, and Firefox or Safari (with a developer extension) can display it more comfortably.
Phone & tablet
Phones rarely have a JSON app, so opening the file in the browser here is usually the quickest way.
Frequently asked questions
Is my JSON file uploaded?
No. The file is read by your browser and shown on your own device. Nothing is sent to a server, and it is gone when you close the tab.
How do I open a JSON file without installing software?
Drop the .json file on this page. It opens straight away in the JSON Viewer & Validator, on Windows, macOS, Linux, Android and iPhone alike.
What if my JSON file doesn't open?
The viewer checks the file's content, not just its name. If it is damaged or not really a JSON file, you'll see an error or can switch to the hex view to look at the raw bytes.
Can I convert JSON to another format?
Yes. The free file converter turns JSON files into other formats in your browser as well, without uploading them.