Developer tools

JSON File Formatter

Format an uploaded JSON file for readable indentation.

Runs locally in your browser — nothing is uploaded.

About this tool

Use JSON File Formatter to complete this focused task without sending your content to a third-party service.

Using JSON File Formatter

Paste or enter your content, run the tool, and review the result before using it.

Helpful tips

Is my information private?

Yes. This developer tools processes your input in the browser and does not upload it.

Is this tool free?

Yes. You can use it without creating an account.

How to use this tool

  1. Choose a JSON file.
  2. Format it locally.
  3. Download the formatted JSON file.

About JSON File Formatter

Format a local JSON document with readable indentation, then download the result. Invalid JSON is identified before any output is created.

Does this tool send my data anywhere?

No. Its calculation or transformation happens on your device.