Resize a photo to an exact size

Resize a photo

Your photo never leaves this page. Nothing is uploaded: it is opened and rewritten in your browser, and the page keeps working with the connection off.

Choose a photo

Or drop one on this box. Any photo your browser can show works. A HEIC photo from an iPhone opens in Safari; in other browsers, save it as a JPEG first.

How it works

1. Choose a photo. Pick one, or drop one on the box. Each photo tool keeps working with the connection switched off once its page has loaded, and the browser test runs every tool that way. The page shows its size in pixels and fills in half of each side to start.
2. Type the new size. In pixels, type a width or a height and the other side follows. Turn off “Keep the proportions” to set both, and the page warns you if that stretches the photo. As a percentage, type how big the copy should be compared with the photo now.
3. Choose the format and make the copy. The page says the final size before you start. Save the copy, or share it. Your original is not changed.

Pixels or a percentage

Use pixels when somebody asks for an exact size: a profile picture, a form that wants a certain width, a slide, a print shop’s template. Use a percentage when you only need it smaller, such as half or a quarter of the size, and do not mind the exact numbers.

A photo’s shape is its width divided by its height. Typing both sides yourself can change that shape, which makes faces look wide or thin. If you need an exact width and height in a different shape, crop first, then resize. The passport photo cropper does that for one common square size.

Why it shrinks in steps

A browser can shrink a picture in one go, but going straight from a large photo to a small one tends to skip pixels and leave jagged edges and shimmering patterns. This page halves the photo, and halves it again, until one more halving would go past the size you asked for. Then it draws the last step. Each step uses the browser’s high quality smoothing where the browser offers it. Enlarging is done in one step, and it cannot invent detail.

Which format to save

• JPEG is the smallest for a photo and opens everywhere. It has no transparency, so the page puts a clear area on white.
• PNG keeps every pixel exactly and keeps transparency, but a PNG of a photo is much larger. Use it for screenshots, drawings and logos.
• WebP is small and keeps transparency. Some older programs cannot open it, and not every browser can write it; the page offers it only where yours can.

JPEG and WebP are written at a high quality setting, so the resize is the only change you see. To trade quality for a smaller file, use the image compressor.

Where Sealed helps, and where it doesn’t

It helps keep the full-size original after you have made the copy that a form or a site asked for. Photos and videos are sealed the moment they arrive, and afterwards you can remove the originals from Photos if you like. Sealed encrypts every file with AES-256-GCM before it is saved.

It doesn’t reach a copy you have already sent: once a file is out, it is out. Until you delete them, the originals stay in Photos, outside the vault. The copy you save from this page is a new file on your device, outside any vault, until you put it somewhere.