Privacy-first · No upload · 100% client-side
JSON Minifier
Shrink JSON payloads for APIs, storage and logging. Paste pretty-printed JSON and get a compact single-line string back.
Input — pretty JSON
Output — minified
Paste JSON and hit “Minify JSON”.
Related tools
JSON Minifier FAQ
Does minifying change my data?
No. It only removes insignificant whitespace and newlines. The parsed value is identical.
Is my JSON uploaded?
Never. Minification runs entirely in your browser.