Image Resizer
Changes an image's pixel dimensions — enter a width or height, keep the aspect ratio locked, or pick a social-media preset. Resizing happens on a canvas in your browser; the file never leaves your device and the original on disk is untouched.
How to use
- Drop the image onto the panel.
- Enter the target width or height; with the ratio locked the other side follows.
- Or pick a preset for the platform you are posting to.
- Download the resized copy.
When you actually need this
- Meeting an exact pixel requirement — profile photos, banners, thumbnails.
- Shrinking a camera photo so a page or email loads fast.
- Producing a consistent size across a set of product or listing photos.
- Downscaling before upload to a site that would recompress a huge image badly.
Downscale freely, upscale carefully
Shrinking an image discards pixels and generally looks clean. Enlarging cannot invent detail — the browser interpolates, and the result softens in proportion to how far you stretch. If a required size is larger than your original, expect visible softness. Resizing changes dimensions, not compression: for a smaller file at the same dimensions, use the image compressor, and for cutting away part of the frame rather than scaling it, use the crop tool.
Related tools
FAQ
Are my photos uploaded to a server when I use Image Resizer?
No. Image Resizer reads the file with the browser's Canvas API and processes every pixel on your own device. The image never leaves your computer, which is why it still works if you go offline after loading the page.
Will Image Resizer reduce the quality of my image?
That depends on the setting you choose. JPEG and WebP are lossy, so a lower quality value means a smaller file and more visible artifacts; PNG is lossless and keeps every pixel exactly. Start around 80 percent quality — most photos stay visually identical at roughly a third of the original size.
Is there a file size or count limit?
There is no limit imposed by the site, because nothing is uploaded. The practical ceiling is your device's memory — very large files (over roughly 50 MP) may be slow on an older phone.