Free Online JSON Minifier & Compressor
Reduce JSON file size by stripping all unnecessary whitespace, indentation, and line breaks. The minifier shows original size, minified size, and the percentage reduction — helping you optimize API payloads, configuration files, and data storage. Simply paste your formatted JSON and get the compact version instantly.
138 bytes
Original
101 bytes
Minified
26.8%
Saved
Common questions
How much space does JSON minification typically save?
Minification typically reduces JSON size by 20-40% depending on the original formatting. Deeply nested JSON with generous indentation sees the most significant savings.
Does minification change the data in any way?
No. Minification only removes whitespace characters (spaces, tabs, newlines) between JSON tokens. The data values, structure, and key ordering remain completely identical.