JSON Formatter

JSON Formatter is a free browser-based tool that beautifies, validates, and minifies JSON data instantly. It's used by developers, data engineers, and API integrators who need to quickly inspect or clean JSON payloads.

Paste any raw or minified JSON string and the formatter pretty-prints it with proper indentation and syntax highlighting. It also validates the structure and flags syntax errors so you can fix malformed data before it reaches your application.

Common use cases include debugging API responses, formatting configuration files, and preparing data for documentation. Everything runs locally in your browser — no data is uploaded to any server, and no account is required.