What is the difference between formatting and minifying?

Formatting rearranges the JSON with indentation for easy reading and debugging; minifying removes all whitespace to produce the smallest possible single-line JSON, suitable for transmission and storage.

Why does it say the JSON format is incorrect?

Common reasons include extra commas, use of single quotes, unquoted key names, mismatched brackets, etc. Please locate the problem based on the error message and correct it.

JSON Formatter

100% local processing

Input JSON

Indentation

FAQ

Absolutely safe. All processing is done locally in your browser; data is never uploaded to the server and is cleared when the page is closed.

What is JSON formatting?

JSON formatting is the process of reformatting compact or messy JSON text with consistent indentation to make its hierarchy clear, easy to read, and debug. Developers use it when debugging API responses, checking configuration files, or verifying data structures, making nested relationships obvious and allowing quick problem location.

This tool integrates formatting, minification, and validation: formatting for readability, minification to remove whitespace and reduce transfer size, and validation to help you find syntax errors like extra commas or quotation marks. All processing is done locally in the browser, with data never uploaded or stored.

How to format JSON

1Paste or input JSON into the left text box.
2Choose the indentation style (2 spaces, 4 spaces, or Tab).
3Click 'Format' to beautify the layout, or 'Minify' to generate single-line JSON.
4After validation passes, copy the result with one click for use.

Why choose our JSON tool?

Privacy first: processing is done locally in the browser, data is never uploaded to servers.

All-in-one: formatting, minification, and validation integrated in the same interface.

Instant feedback: errors are precisely indicated to help you correct them quickly.