Resize Image
Drag the corner handle to resize visually, or enter exact pixel dimensions. Runs entirely in your browser.
Click to upload or drag and drop
Select an image file
How it works
Drag the blue handle at the bottom-right of the preview to resize visually, pick a preset, or type exact pixel values. With the aspect ratio locked, changing one dimension scales the other proportionally. The image is redrawn onto a canvas at the exact dimensions you set when you click Resize Image.
A worked example
A phone photo of 4000 × 3000 pixels (12 megapixels) is too heavy for a web page. With the aspect ratio locked, typing 1200 as the width sets the height to 1200 ÷ 4000 × 3000 = 900 pixels. The new image has a ninth of the original pixels (1.08 million against 12 million), so it loads much faster while keeping the same 4:3 shape.
Choosing a size
- Width for a full-width image on a web page: about 1200 to 2000 pixels covers most screens.
- Images in email or a chat: around 1000 to 1600 pixels on the long side is usually enough.
- Larger is not better. Scaling a small image up cannot add detail, only soften it.
Things to know before you download
- The presets set an exact width and height and do not look at your picture's proportions. Choosing Instagram square on a landscape photo will squash it. Crop first if you need a different shape.
- PNG files stay PNG. Every other format, including WebP, GIF and BMP, is saved as a JPEG at 92% quality, and transparent areas do not carry over.
- The picture is redrawn rather than edited in place, so camera metadata such as location and device details is not copied into the new file.
- Files up to 50 MB can be loaded. Large images use a lot of memory when decoded, so a big photo can still be slow on an older phone.
- This sets pixel dimensions, not file size in kilobytes. To aim for a smaller file, resize first and then use the Image Compressor.
Guide
- How to Reduce a Photo's File Size — Why resizing usually saves more than the quality slider, and the order that gets a photo under a KB limit while staying readable.
Frequently asked questions
Will resizing reduce image quality?
Making an image smaller generally looks fine. Making it significantly larger than its original size can look soft or blurry, since there's no new detail to add.
What happens if I turn off the aspect ratio lock?
You can set width and height independently, which will stretch or squash the image if the new ratio doesn't match the original.
Can I resize to a specific file size, like 100 KB?
Not directly. This tool sets width and height in pixels. Smaller dimensions normally mean a smaller file, and the Image Compressor can then reduce the size further.
Do the presets keep my picture's proportions?
No. A preset applies its exact width and height, so an image with a different shape will be stretched. Crop to the right proportions first, then resize.
What is the largest size I can resize to?
Up to 16,384 pixels on either side and no more than about 268 million pixels in total, which is what browsers can handle reliably. Larger sizes show an error, and some phones allow less.