{ }

JSON Formatter

Format, beautify and validate JSON online with clean indentation.

JSON ToolsBrowser-only • PrivateFree

Indent

JSON Input

Formatted JSON

Output will appear here...

Privacy First: All processing happens locally in your browser. Your data never leaves your device and is never uploaded to any server.

About JSON Formatter

The JSON Formatter beautifies minified, escaped, or messy JSON into clean, properly indented, readable output in one paste. It's the everyday tool for developers debugging REST APIs, config files, and log payloads. Every keystroke is validated, so syntax errors are caught with the exact position of the problem. Formatting runs entirely in your browser, so even private API responses never leave your machine. Pair it with the JSON Minifier to compress again, or the JSON Validator to lint before shipping.

How to Use

1Open JSON Formatter and paste or type your data into the input area.
2Adjust any available options to match the result you want.
3Your output is generated instantly — no button-clicking required for most tools.
4Use the Copy or Download button to save your result.

Common Use Cases

Debugging API responses while building web and mobile apps
Cleaning up minified or messy JSON from logs and network tabs
Preparing configuration files and fixtures for testing
Converting data between JSON and other formats for imports/exports

Frequently Asked Questions

What indentation options does the JSON formatter support?

You can pretty-print JSON with 2-space or 4-space indentation. If you instead need to compress JSON onto a single line, use the JSON Minifier.

Why does my JSON show as invalid?

The most common causes are trailing commas, single quotes instead of double quotes, unquoted keys, or a missing bracket. The formatter points to the exact character where parsing failed so you can fix it fast.

Is JSON Formatter free to use?

Yes. JSON Formatter is completely free with no sign-up, no subscription, and no usage limits. Every tool on CodeUtilityKit is free forever.

Is my data safe when I use JSON Formatter?

Absolutely. JSON Formatter runs entirely in your browser. Your input is processed locally with JavaScript and is never sent to, stored on, or logged by any server — so it is safe even for private or sensitive data.