Developer Tools

Advanced JSON Viewer & Formatter

Paste JSON or upload a file. Format, minify, copy, download, switch to Tree View, and toggle Dark Mode.

Fast formatting Local processing Tree + Edit view
JSON Workspace
Input on left tab, output on right tab. Output is editable in “Edit Mode”.
Idle
Only .json files. We validate before formatting.
Formatted Output
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Tip: Output is editable in “Edit Mode”. Tree View is for browsing quickly.

JSON Viewer & Formatter

This tool helps you view, format, and validate JSON quickly. You can paste JSON or upload a file, then format it for readability, minify it for size, copy it to clipboard, or download the cleaned output. A Tree View is also available for browsing nested data structures.

What this tool can do

  • Format: Pretty‑print JSON with indentation for easy reading.
  • Minify: Remove whitespace to make JSON smaller.
  • Validate: Catch invalid JSON before use in apps or APIs.
  • Tree View: Expand and collapse nested objects quickly.
  • Copy / Download: Export the final JSON in one click.

How it works

When you click Format or Minify, the tool parses your JSON in the browser. If the JSON is valid, it is reformatted and displayed in the output panel. If the JSON is invalid, you’ll see an error message so you can fix the issue.

Tip: Use Tree View for large JSON files. It makes it easier to explore nested keys.

Why JSON formatting matters

Clean JSON improves readability and reduces mistakes in debugging. Proper formatting also helps developers spot missing commas or unmatched brackets before shipping changes.

Privacy & local processing

Your JSON is processed locally in your browser. No data is uploaded or stored, which makes this tool safe for sensitive configuration files and API responses.

Frequently asked questions

Does this support large JSON files?
Large files may take longer to render, especially in Tree View.
Is the output editable?
Yes. After formatting, the output becomes editable in “Edit Mode”.
Why does Tree View not open?
Tree View requires valid JSON. Fix errors in the input first.
Can I minify and then download?
Yes. Minify the JSON and then click Download to save it.
Disclaimer: This tool is for informational and productivity purposes only. Always verify JSON validity in your own workflow before deploying to production.