ReSmush.it
Free image optimization: shrink JPG, PNG and more by URL
Point reSmush.it at an image URL and it returns a compressed copy plus before/after byte sizes as JSON. It is a keyless optimization service supporting JPG, PNG, GIF, BMP and TIFF with adjustable quality.
GET http://api.resmush.it/ws.php?img=https://www.gstatic.com/webp/gallery/1.jpg&qlty=80
{
"src": "https://www.gstatic.com/webp/gallery/1.jpg",
"dest": "http://hel1.static.resmush.it/483d8b9a72d84bff4ca924ba7e487cf1/1.jpg",
"src_size": 44891,
"dest_size": 43470,
"percent": 3,
"output": "json",
"generator": "reSmush.it rev.3.0.11.20240125"
}curl "http://api.resmush.it/ws.php?img=https://www.gstatic.com/webp/gallery/1.jpg&qlty=80"const res = await fetch("http://api.resmush.it/ws.php?img=https://www.gstatic.com/webp/gallery/1.jpg&qlty=80");
const data = await res.json();
console.log(data);import requests
res = requests.get("http://api.resmush.it/ws.php?img=https://www.gstatic.com/webp/gallery/1.jpg&qlty=80")
print(res.json())BROWSER CALLS BLOCKED (NO CORS/HTTPS) — USE THE CURL SNIPPET
/ws.php?img=https://www.gstatic.com/webp/gallery/1.jpg&qlty=80PROBEDFree image optimization: shrink JPG, PNG and more by URL
/ws.php?limit=5Ws Php — documented GET route.
/ws.php?page=1Ws Php — documented GET route.
We probe a documented GET and expect 2xx JSON — full uptime and health score. Export includes every documented route below.
Stable. No schema drift observed since monitoring began — the response shape has not changed under our checks.
ReSmush.it: common questions
Is ReSmush.it free to use?
Yes — ReSmush.it is a free media API. Free tier: Free; per-image size cap applies (see docs). Whether the free tier allows commercial use is unclear — check the provider docs.
Does ReSmush.it need an API key?
No — ReSmush.it needs no API key or signup. You can call it straight away; rate limits still apply (Unpublished).
Can I call ReSmush.it from the browser?
Not directly — ReSmush.it doesn't send browser-friendly CORS headers, so call it from a server or proxy instead. Copy the curl or Python snippet on this page to get started.
Is ReSmush.it up right now?
As of our last scheduled check, ReSmush.it is healthy with 100% uptime over 90 days and a 462 ms median response. We re-probe it every sweep — the status badge and uptime chart above always show the latest.