JSON Formatter Online
Paste your JSON and instantly format it with proper indentation and syntax highlighting. This free online JSON formatter runs entirely in your browser for maximum speed and privacy.
How to Use
- Paste or type your JSON into the input field on the left.
- Choose your preferred indentation (2 spaces, 4 spaces, or tab).
- Click "Beautify JSON" or press Ctrl+Enter to format.
- Copy the formatted output using the copy button.
Features
- Format JSON with 2-space, 4-space, or tab indentation
- Auto-beautify on paste for instant formatting
- Syntax error detection with position details
- Auto-fix for common JSON mistakes like trailing commas and single quotes
- Copy formatted output to clipboard with one click
- Keyboard shortcut support (Ctrl+Enter)
Frequently Asked Questions
What is a JSON formatter?
A JSON formatter (also called a JSON beautifier or pretty printer) takes compact or minified JSON and adds consistent indentation and line breaks to make it human-readable.
Is the JSON formatter free?
Yes. The JSON formatter on JSONTools.pro is completely free with no usage limits or account required.
Is my data uploaded to a server?
The formatter processes JSON using a lightweight server call for reliability, but your data is never stored or logged. For maximum privacy, all error detection and auto-fix logic runs client-side.
Can the formatter fix invalid JSON?
The formatter attempts to fix common issues like trailing commas, single quotes, unquoted keys, and JavaScript-style comments before formatting.
What is the difference between formatting and validation?
Formatting adds indentation and whitespace to make JSON readable. Validation checks whether JSON conforms to the specification and reports syntax errors. The formatter includes basic validation as part of the formatting process.