Is my JSON file uploaded to a server?

No. The file is read directly in your browser using the FileReader API. Nothing leaves your device.

What is the maximum file size supported?

There is no hard limit imposed by this tool — it depends on your browser memory. Files up to several hundred megabytes should work on modern machines.

Can I edit the JSON after viewing it?

This tool is a viewer, not an editor. To edit, copy the formatted output and paste it into a text editor or the JSON Formatter tool.

JSON File Viewer

Upload and view JSON files with pretty-printing and structure info.

Drop a JSON file here or click to browse

Accepts .json files

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FAQ

Is my JSON file uploaded to a server?: No. The file is read directly in your browser using the FileReader API. Nothing leaves your device.
What is the maximum file size supported?: There is no hard limit imposed by this tool — it depends on your browser memory. Files up to several hundred megabytes should work on modern machines.
Can I edit the JSON after viewing it?: This tool is a viewer, not an editor. To edit, copy the formatted output and paste it into a text editor or the JSON Formatter tool.

Upload a JSON file from your computer and instantly view its formatted contents in the browser. The tool parses the JSON and shows it with proper indentation, along with metadata including file size, top-level key count, and data type. No server upload required — the file is read locally.