JSON formatter and validator

Beautify messy JSON, validate syntax, and spot errors instantly in your browser.

How to use the JSON Formatter

Format JSON or validate it in seconds with these quick steps.

  1. Paste your JSON into the input area.
  2. Choose Beautify to pretty-print or Validate to check syntax.
  3. Copy the output or clear to start over.

Example

Input

{"name":"Zettools","tags":["json","formatter"],"active":true,"count":3}

Output

{
  "name": "Zettools",
  "tags": [
    "json",
    "formatter"
  ],
  "active": true,
  "count": 3
}

Beautify turns compact JSON into readable, indented output.

JSON Formatter FAQs

What is a JSON Beautifier?

A JSON Beautifier formats minified or messy JSON into a readable, indented structure.

Does this tool validate JSON?

Yes. Switch to Validate to check syntax and confirm whether the JSON is valid.

Is my JSON sent to a server?

No. Formatting and validation happen locally in your browser.