JSON Formatter & Validator

Paste your JSON code below to validate, format, and beautify it instantly.

Loading editor...

Your JSON is processed locally in your browser. No data is uploaded.

JSON Formatter & Validator – Beautify and Check JSON Online

Use this free JSON formatter to validate JSON syntax, fix common errors, and present your data with clean, consistent indentation. Ideal for developers, QA engineers and learners.

Key features

Fast, in‑browser validation and formatting
Copy input/output with one click
Readable indentation and stable key order
Sample JSON and quick clear actions
No data leaves your device

How to use the JSON formatter

Paste or type your JSON in the left editor.
Click “Validate & Format” to check syntax and beautify.
Copy the formatted JSON from the right editor.

FAQ

What is a JSON formatter?
A JSON formatter validates and beautifies JSON so it is easier to read and debug.

Is my JSON data sent to a server?
No. Formatting happens entirely in your browser for privacy.