JSON Formatter

Beautify, indent, and validate your JSON in one click. Free, private, and runs entirely in your browser.

Format JSON Now

Paste your JSON data below

Paste minified or formatted JSON. Max size: 10 MB.

Indentation

Formatted JSON Output

How JSON Formatter Works

Three steps to clean, readable JSON.

Paste JSON

Copy your JSON from any API response, file, or log and paste it into the input area. It can be minified, nested, or any valid structure.

Format or Minify

Click "Format JSON" to beautify with configurable indentation, or "Minify" to compress into a single line for storage or transfer.

Copy the Result

Copy the nicely formatted or minified JSON to your clipboard for use in your code, configuration, or documents.

Features of JSON Formatter

Everything you need for clean, readable, validated JSON.

Beautify with Custom Indentation

Format JSON with 2 spaces, 4 spaces, or tabs. Choose the indentation style that matches your project conventions.

Minify JSON

Compress formatted JSON into a compact, single-line version — ideal for storage, API payloads, or reducing file size.

Validate as You Format

The formatter validates your JSON syntax and reports clear, friendly errors if your JSON is malformed.

100% Private

Everything runs locally in your browser. Nothing is uploaded, logged, or stored.

Works Anywhere

Runs on any device with a modern browser. No install, no account, completely free.

Instant Results

Formatting happens instantly in the browser with zero network latency.

What Is JSON Formatter?

JSON is the backbone of modern web development — it is what APIs return, what configuration files use, and how data is exchanged between systems. But JSON often arrives minified into a single, dense line that is impossible to read or edit. A JSON formatter takes that compact data and beautifies it into a properly indented, color-coded, human-readable structure.

This free online JSON formatter lets you paste minified or messy JSON and instantly produces clean, indented output. You choose the indentation style (2 spaces, 4 spaces, or tabs), and you can also do the reverse — minify formatted JSON back into a compact single line for storage or transfer. Every operation validates your JSON and shows friendly errors when something is wrong.

Everything runs locally in your browser and no data is uploaded, making this JSON formatter safe even for sensitive configuration files or private API responses. Whether you are a developer debugging an API response, an analyst cleaning up exported data, or a student learning JSON, this tool is free, fast, and available on any device.

Frequently Asked Questions

Is this JSON formatter free to use?

Yes, it is completely free with no signup, no usage limits, and no ads on the tool itself. You can format as much JSON as you need.

Does the formatter validate my JSON?

Yes. Every format and minify operation parses and validates your JSON first. If it is invalid, you will see a clear, friendly error message explaining the issue.

Can I choose the indentation style?

Yes. Choose between 2 spaces, 4 spaces, or tab indentation from the options above the buttons. The output updates to match your preference.

Is my JSON safe when I format it online?

Absolutely. Formatting happens entirely in your browser. Your JSON is never sent to or stored on any server.