Paste formatted JSON and get a compact, whitespace-free version ideal for reducing payload size before sending over the wire.
Did this tool save you some time? A quick testimonial helps a lot.
Paste formatted JSON and get a compact, whitespace-free version ideal for reducing payload size before sending over the wire. Common questions — like is there a file size limit — are answered in the FAQ below.
Add your input to the workspace above, review the result, then copy or download it when it's ready. No account or installation is required.
JSON Minifier runs in your browser, so the information you enter stays on your device instead of being uploaded to a server.
A few worked examples so you know what to expect before you paste in your own input.
Input
{
"name": "Ada",
"active": true
}Output
{"name":"Ada","active":true}Input
[ 1, 2, 3 ]
Output
[1,2,3]
Input
{
"message": "Hello World",
"count": 2
}Output
{"message":"Hello World","count":2}Validating, diffing, converting, and minifying JSON is a daily task. These five patterns cover almost all of it.
How tokens map to cost and context limits for GPT and Claude — and how to estimate spend before you ship a prompt-heavy feature.
Related Tools