Image Resizer
Give an image a new width and height, or shrink it by a percentage. The file never leaves your device — the resizing happens in this page.
How to use it
- Choose an image, or drag one onto the box. It is read by this page and never sent anywhere.
- Type a new width, or switch to percentage and pick one. With the shape locked, the other side follows on its own.
- Download the result. The original file on your device is untouched.
Why the locked shape matters
An image has a ratio between its width and its height, and changing only one of them stretches everything in it. Faces go wide, circles become ovals, text leans. It is the single most common thing that goes wrong when people resize by hand, and it is why the lock is on by default here.
If you genuinely need a different shape — a square thumbnail from a wide photo — unlock it and you will get exactly the numbers you typed, squashing included. Cropping is usually the better answer, because it keeps everything the right shape and simply shows less of it.
Making an image bigger
You can enlarge here, but be clear about what happens: the browser invents the new pixels by blending the ones around them. It cannot add detail that was never captured. A 200-pixel-wide photo blown up to 2,000 pixels will be 2,000 pixels of blur, and no tool on any website changes that — the information is simply not in the file.
Shrinking is the opposite: it throws information away, which is why a smaller copy always looks clean and why a resized photo is usually a much smaller file as well.
Frequently asked questions
Is my photo uploaded to a server?
No. The file is read by your own browser, drawn onto a canvas at the new size, and handed back to you. Nothing is sent anywhere, which also means very large images work fine here and there is no queue and no size limit beyond what your own device can hold.
Will resizing make the file smaller?
Usually, and often dramatically - halving both sides means a quarter of the pixels. The exact saving depends on the format and the picture, so the file size of the result is shown before you download it.
Does the format change?
No. A PNG comes back a PNG and a JPEG comes back a JPEG, because changing the format silently would be a surprise. A JPEG is re-encoded when it is resized, which costs a little quality - unavoidable for any tool that changes the pixels. Use the image converter if you want a different format.
Why does my enlarged image look blurry?
Because enlarging cannot add detail that the original never recorded. The browser fills the new pixels by blending neighbours, which is the best anyone can do without inventing things. If you need a large sharp image, you need a larger original.
Can I resize several images at once?
Not here - this page handles one at a time, on purpose, so that you see each result before you keep it. Doing it one by one also means you can give each image the size it actually needs rather than one setting for all of them.
Is my text sent anywhere?
No. Everything happens in JavaScript inside your own browser. Nothing is uploaded and nothing is saved - close the tab and it is gone.