Resize image
Making a picture smaller on screen is the single most effective way to make the file smaller too. Give it an exact width and height, a percentage, or a box to fit inside, and the proportions are kept for you unless you say otherwise. It all happens on your own computer.
How to use it
- 1 Add the images you want to resize.
- 2 Enter a width, a height, or a percentage. Leave one axis blank to keep the proportions.
- 3 Pick whether the image should fit inside the box, fill it, or stretch to it exactly.
- 4 Download the resized files.
Formats this tool accepts
Each one has a reference page covering what it stores and where it is supported.
Questions about resize image
Will resizing make my image blurry?
Scaling down is safe and usually sharpens the perceived result, because detail is being averaged rather than invented. Scaling up cannot recover detail that was never captured, so a small image enlarged past roughly double its original size will look soft no matter which resampling method is used.
What size should a web image be?
Match the largest size the image is actually displayed at, then account for high density screens by exporting at two times that. A full width hero on a typical layout is fine at 1600 to 2000 pixels wide. Anything beyond that is bytes the visitor downloads and never sees.
Does it keep the aspect ratio?
By default yes. Enter one dimension and the other is calculated for you. If you enter both and choose the exact mode, the image is stretched to fit, which distorts it. The fit mode is usually what you want when both numbers are fixed.
Are my files uploaded to a server?
No. The whole thing runs inside the browser tab you already have open. Your file is read straight from your own disk, worked on there, and handed back as a download. Nothing is sent anywhere, nothing is stored, and there is no account and no queue.
Is there a file size limit?
There is no server-side limit because there is no server. The practical ceiling is your device memory, since the file and its output both have to fit in the tab. Files up to a few hundred megabytes are usually fine on a desktop machine, while phones and older laptops will struggle sooner. If a large file fails, close other tabs and try again.
Does it work offline?
Yes, once the page has loaded once. The engine is cached by the browser, so you can turn off your connection, reload the page and keep working. That is a useful side effect of doing the processing locally rather than a separate offline mode you have to enable.
Can I process several files at once?
Yes. Drop as many files as you like and they are queued and processed one after another, then offered as individual downloads or a single ZIP. Because everything runs locally, the speed depends on your own processor rather than on how busy a service is.
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