JSON formatter
Validate JSON and make it easy to read.
Developer tools
Developer tools · FREE ONLINE TOOL
JSON minifier
Remove whitespace from valid JSON.
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How to use JSON minifier
Create a compact representation of valid JSON by parsing it and serializing it without indentation. Whitespace inside string values stays intact. The output is normalized rather than a byte-for-byte whitespace edit, so number precision and duplicate-key behaviour follow the JavaScript JSON parser.
01
Paste valid JSON
Add the data you want to compact.
02
Validate and minify
Run the tool to parse and serialize it without extra formatting.
03
Save compact JSON
Copy the output or download the minified.json file.
COMMON QUESTIONS
JSON minifier: useful answers
Are spaces inside string values removed?
No. The tool removes formatting whitespace around JSON structure; spaces contained in string values remain.
Will duplicate object keys be preserved?
No. JavaScript parsing keeps the last value for a duplicate key. Avoid duplicate keys when the original data must be preserved.