JSON Formatter & Validator
Prettify minified JSON, validate structure, and fix common errors inline.
How JSON Formatter & Validator Works
JSON (JavaScript Object Notation) is the backbone of modern APIs, but reading minified JSON is painful. This formatter beautifies your code with proper indentation (2 or 4 spaces) and color coding.
It also acts as a strict validator. If you paste invalid JSON, it will highlight exactly where the syntax error occurred (e.g., missing quotes or trailing commas), helping you debug API responses in seconds.
Frequently Asked Questions
Is my JSON data sent to a server?
No. All processing happens right here in your browser using JavaScript's native JSON engine. No data leaves your device.
Can it fix trailing commas?
Currently, the validator points out errors. We recommend using the error position to manually fix trailing commas, which are invalid in standard JSON.
What happens if I minify code?
Minification removes all unnecessary whitespace and newlines, reducing the payload size significantly. This is ideal for production environments.