Free JSON Formatter

JSON

Free JSON formatter and beautifier tool. Format JSON data online at no cost. No registration required. It runs in your browser, and your input stays on this device.

Back to JSON Formatter

Formatter example

Compare the exact input shape with the cleaned output before opening the editor.

Local preview

Before

input
{"user":{"id":42,"name":"Ada"},"active":true}

After

formatted
{
  "user": {
    "id": 42,
    "name": "Ada"
  },
  "active": true
}

Workflow

Use JSON without sending code.

Paste a snippet, run the action, review any highlighted issue, then copy the result back to your work.

Current language
JSON
Current action
JSON Formatter
  1. 01

    Start

    Paste a snippet or full file into the editor.

  2. 02

    Run

    Use Run JSON Formatter from the action bar.

  3. 03

    Review

    Fix syntax issues if processing stops.

  4. 04

    Move

    Use Copy code when the result is ready.

Files
.json
Paste a JSON snippet or a full source file.
Engine
JSON parser
Runs the browser-side formatter for readable output.
Privacy
Local run
The editor does not send pasted code to a formatting API.
Result
Readable output
Move the formatted code back to your editor.