Image Resizer
JPG has no transparency, so see-through areas become white.
For JPG and WebP. PNG is always lossless.
How to use the Image Resizer
- Choose images, or drag and drop them onto the box. One file or a whole batch.
- Choose By pixels and enter a width, a height or both, or choose By percent and enter a scale. Keep aspect ratio stays on unless you need an exact size.
- Pick an output format and, for JPG or WebP, a quality. Every file updates as you change the settings.
- Download files one by one, or use Download all. Each name includes the new size, for example photo-1280x960.jpg.
Examples
- A 4000 × 3000 phone photo with a max width of 1280 becomes 1280 × 960, ready for a website or an email.
- A portrait 3000 × 4000 photo with max width and height of 1280 becomes 960 × 1280: it fits inside the square without being cropped or stretched.
- A 1920 × 1080 screenshot at 50% becomes 960 × 540.
- A profile picture with Keep aspect ratio off, 400 × 400 is stretched to exactly 400 × 400. If the original isn’t square, it will look squashed, so crop it first.
How resizing works
Your browser decodes each image, draws it onto a canvas at the new size with high-quality smoothing, and saves it in the format you choose. The work happens in a background worker on your device, so nothing is uploaded and the page stays responsive.
Keeping the aspect ratio
The aspect ratio is the shape of the image: width divided by height. With Keep aspect ratio on, the width and height you enter are a box the image is scaled to fit inside, so it is never stretched. Leave one blank and only the other limits it. With it off, the image is set to exactly the size you enter.
Making images smaller or larger
Shrinking an image keeps it sharp and usually makes the file much smaller. Enlarging can’t add detail that isn’t there, so enlarged images look softer; the file list warns you when an image was made bigger. Each side can be up to 16,384 pixels.
Format and quality
Same as original keeps each file’s format. JPG suits photos and fills transparent areas with white. PNG is lossless and keeps transparency, so it suits logos and screenshots. WebP gives the smallest files for most images. To reduce file size without changing dimensions, use the Image Compressor.
Privacy and metadata
Files are processed only in your browser’s memory and are cleared when you remove them or leave the page. Resized images don’t keep the original’s metadata, such as camera details or location.
Frequently asked questions
Are my images uploaded?
No. Resizing happens entirely in your browser. Your images never leave your device, and there is no sign-up.
How do I resize an image without distorting it?
Keep Keep aspect ratio on and enter only a width or only a height. The other side is worked out for you, so the image keeps its shape.
Can I resize many images at once?
Yes. Add as many files as you like. They are all resized with the same settings, one at a time to keep memory use steady, and you can download them together with Download all.
Is there a file size limit?
Each file can be up to 100 MB, and each side of the result up to 16,384 pixels. Very large images can still exceed what some browsers, especially on phones, can handle.
Which formats are supported?
JPG, PNG and WebP. You can keep the original format or save as JPG, PNG or WebP. Animated WebP files are resized to their first frame. GIF and AVIF aren’t supported.
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