Resize IMAGE
Set the width and height you need, or scale by percentage. Resize a whole folder in one pass.
or drop images here
No upload · No size limit · No account
How to resize image
- Add your imagesDrag them in or press Select images. A whole folder works — every file is resized with the same settings.
- Type a width or a heightFill in one and leave the other blank: with Keep ratio on, the second is worked out for you and nothing gets squashed. Fill in both only if you deliberately want to stretch the image.
- Choose an output formatKeep format leaves it as it arrived. Switch to WebP for the web, JPG for sending on, PNG if the image has a transparent background worth keeping.
- DownloadEach row shows the new pixel dimensions so you can check before saving.
When you need it
An upload wants exact dimensions
Profile photos, banners and marketplace listings often demand a fixed size and reject anything else. Resizing first saves the trial and error.
A photo is far larger than it will ever be shown
A 4000-pixel photo in a 1000-pixel column carries four times more detail than anyone sees. Capping the width is often a bigger saving than compression.
A batch needs to match
Product shots or gallery images look wrong at mixed sizes. One pass makes them consistent.
Questions
What happens if I only fill in the width?
With Keep ratio switched on, the height is calculated to match, so the proportions stay exactly as they were. This is what you want almost every time.
Can I resize by percentage instead of pixels?
Not directly, but the arithmetic is easy: to halve a 3000-pixel-wide image, type 1500. The row shows the original dimensions, so you have the number in front of you.
Does resizing also make the file smaller?
Yes, usually a lot smaller — fewer pixels means less data. Resizing and compressing together gives the biggest reduction, which is why the compress tool has its own max width setting.
What sizes should I use for social media?
Instagram posts are 1080×1080, stories 1080×1920, YouTube thumbnails 1280×720. Rather than remembering them, the social media resizer has the sizes built in.
Are my images uploaded anywhere?
No. The resizing happens in your browser using the Canvas API. The file never leaves your device and there is no server to send it to.
More tools
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How it works
Every tool here runs on the HTML Canvas API inside your own browser. When you drop a file, it is read straight into memory, changed there, and handed back as a download. Not one byte goes over the network — which is why there is no upload wait, no file size cap, and no way for anyone, including us, to see your images.
That also means the tools keep working with no connection once the page has loaded, and the only limit on file size is your device's memory.