Resize Image

How to resize an image

Add a photo or graphic above, choose the new size and download the result. You can resize by pixels, by percentage, or by centimetres or inches for printing. The image is resized in your browser, so it never leaves your device, and the original is never changed. There’s nothing to install and no sign-up.

1. Select an image: JPG, PNG or WebP, from your computer or phone.
2. Choose how to size it: pixels, a percentage, or physical size with pixels per inch.
3. Keep proportions on to avoid stretching; type the width and the height follows.
4. Pick the format and quality, check the new size and file size, and download.

Reading the result

After you choose a size, the preview shows the resized image with its new dimensions in pixels and its file size, next to the original’s dimensions and size, so you can see the saving straight away. In Centimetres or Inches mode it also shows the print size at your chosen pixels per inch. If you’re enlarging, a warning appears. The download is named after your file and the new size, for example holiday-1200×900.jpg, so it’s easy to tell apart from the original.

Resizing and compressing are different

Shrinking dimensions is often the biggest single saving in file size: halving the width and height leaves a quarter of the pixels (simple arithmetic). For an exact size in kilobytes, see resize image to 100 KB and the other size pages.

Keeping proportions

Every image has an aspect ratio, the relationship between width and height, such as 4:3 for many phone photos or 16:9 for widescreen. With “Keep proportions” on, changing the width sets the height for you, so faces and products don’t look stretched or squashed.

If a place needs a different shape, for example a square profile picture from a rectangular photo, resizing alone will distort it. Crop to the new shape first, then resize; or ask in the box under the tool: “crop to a square around the face and make it 800 × 800”.

Common pixel sizes

Websites, marketplaces and social networks publish their own recommended sizes and change them from time to time, so check the current help page of the place you’re uploading to and enter its numbers here.

Resizing for print: centimetres, inches and pixels per inch

On paper, size depends on how many pixels go into each inch. Choose Centimetres or Inches, enter the print size and the pixels per inch; the tool works out the pixels. 300 pixels per inch is a common target for sharp prints. For example, a 10 × 15 cm print at 300 pixels per inch needs 1181 × 1772 pixels. More examples and the formula are on the resize image in cm page.

JPG, PNG or WebP?

• JPG for photos: small files; the quality setting trades size for detail (90 is a good default). JPG has no transparency, so transparent areas become white.
• PNG for screenshots, logos and graphics with sharp edges or transparency; files are larger for photos.
• WebP for websites: usually smaller than JPG at similar quality, and supports transparency. Check that the place you’re uploading to accepts WebP.

Can you make a small image bigger?

Yes, you can enlarge an image, but resizing only adds pixels; it can’t add detail that wasn’t captured, so enlarged images look soft. The tool warns you when you enlarge. For a modest increase, results are usually fine on screen; for large enlargements, start from a bigger original if you have one.

Resizing on a phone

The resizer works in mobile browsers on iPhone and Android: tap Select an image, choose from your photos, set the size and download. iPhone photos in HEIC format can be opened where the browser supports it; if one doesn’t open, convert it first with HEIC to JPG. Photos come out the right way up, because the phone’s orientation flag is applied.

Sizing images for sharp screens

Many phones and laptops have high-density screens that use two or more physical pixels for every point of layout. An image shown 600 pixels wide on a web page therefore looks crisper if the file is about 1200 pixels wide. If you’re preparing images for a website, resize to about twice the displayed width, then compress, so they stay sharp without being needlessly heavy.

Resizing photos for email and messages

Photos straight from a phone are often several thousand pixels wide, far more than anyone needs to view them on screen. Resizing to around 1600 to 2000 pixels on the long side keeps them clear on a laptop and makes them much quicker to send and open. Use JPG at quality 85 to 90 for the best balance of size and detail.

Troubleshooting

Resize by asking

• “Make these 30 product photos 1200 pixels wide.”
• “Resize to 800 × 800 and keep it under 100 KB.”
• “Make this photo print-ready at 10 × 15 cm.”

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