Image Resizer

How to resize an image

Drop an image onto the box, click it to choose a file, or paste an image with Ctrl+V. Then type a new width or height, or click a preset. With Keep proportions ticked, changing one side updates the other so the image isn't squashed. The preview and file size update automatically; click Download to save the resized copy. Your original file isn't changed.

Everything happens inside your browser. The image is never uploaded to a server, so private photos, documents and client work stay on your device, and large files resize in seconds without waiting for an upload.

Presets for social media and YouTube

Platforms change their recommended sizes from time to time, so check their help pages for anything critical.

Fill, fit or stretch?

When the new size has a different shape from your image, such as turning a tall phone photo into a wide YouTube thumbnail, choose how to handle it. Fill and crop fills the whole frame and trims the edges, which is best for photos. Fit with background shows the whole image and fills the empty space with the background colour you pick, which is best for logos and screenshots. Stretch forces the image into the new shape and usually looks distorted.

Formats and quality

JPG is best for photos and gives small files. PNG keeps sharp edges and transparency, so use it for logos, icons and screenshots with text. WebP is a modern format that's usually 25 to 35 percent smaller than JPG at the same quality and works in all current browsers, which makes it ideal for websites. The quality slider applies to JPG and WebP; 80 to 90 percent looks the same as the original to most people.

Making an image bigger than the original can't add detail, so enlarged photos look soft. To make a file smaller in kilobytes without changing its dimensions, use the Image Compressor.

Frequently asked questions

Last updated October 10, 2026