Will resizing make my file smaller?

Making the image smaller in pixels usually makes the file smaller too. For a specific file size, use Compress image.

Does it keep my file format?

Yes. A JPG stays a JPG and a PNG stays a PNG.

Set an exact width and height in pixels, without stretching the photo.

Select image

or drop an image here

Your files stay on your device. Nothing is uploaded.

Click Select image and choose your photo.
Type the new width or height. With the lock on, the other side updates by itself so the photo keeps its shape.
Click Resize image, then Download image.

Making an image smaller is always clean. Making it much bigger will look softer, because no tool can add detail that is not there. For enlarging, Upscale image gives a smoother result.
Turn the lock off only when you need an exact shape, such as 1200 × 630. To get that shape without stretching, crop first.
Resizing changes pixels, not file size limits. If you need a smaller file, compress it afterwards.
The largest size is 8,000 pixels on either side.

You can type any width and height, but the photo will stretch or squash to fit. Crop first if you want to change the shape cleanly.