How it works
Resize images runs on this page, in browser memory. The file you choose is never sent to a server: it is read through the File API, processed locally and handed back as a download.
In three steps
- Choose a file from your device, or drag it onto the drop area.
- Adjust the options on the right, if the tool has settings.
- Press “Process locally” and download the result.
What it takes and what it returns
This tool accepts JPG, PNG, WebP, AVIF and produces JPG, PNG, WebP. The work is done by Canvas.
Real limits
These limits come from what a browser can do safely, not from a paid plan:
- At most 10000 px per side and 50 megapixels in total.
What it does not do
Cropping to a fixed ratio keeps the centre of the image. You cannot pick the kept area by hand.
Common questions
Do my files reach a server?
No. Processing happens in browser memory. The network is used only to download the application's libraries, and your file's contents are not part of those requests.
Which formats does Resize images accept?
It accepts JPG, PNG, WebP, AVIF and produces JPG, PNG, WebP.
Do I need an account?
No. The tool works without an account and without installing anything during the free pilot.
Does it work on a phone?
Yes, in current browsers. Very large files can exceed the memory a phone has available, in which case the job stops with a clear message.