Format, validate, minify JSON data fully inside your browser, no data upload to remote server
Our free online JSON formatter is a must-have utility for every web and backend developer. This tool provides instant JSON pretty print to add clean indentation to compressed raw JSON, making long API responses easy to read and debug. The built-in JSON validator scans every character of your input to locate syntax errors, missing commas, broken brackets and invalid JSON values.
The JSON minify function removes all line breaks, extra spaces and indentation to shrink JSON file size, which helps reduce API payload size and speed up web page loading. Unlike many online JSON editors, all processing happens locally within your web browser. Your sensitive JSON data will never be sent to any external server, which fully protects your privacy and confidential project data.
Software developers, API testers, frontend engineers, backend programmers, QA testers and data analysts regularly use our JSON lint tool to parse REST API responses, debug database JSON output and fix malformed JSON data. There is no registration, login, payment or file upload limit — all features are 100% free for unlimited daily use.
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