Resize to exact dimensions
Type a width and the height follows automatically while “Keep aspect ratio” is on. Switch it off when you need a specific shape. The tool uses your browser’s high-quality scaling, which gives better results when shrinking than simply discarding pixels.
Social media presets
Tap a preset to fill in the size. Presets turn on “Fill and crop” automatically, which scales the picture until it covers the whole frame and trims what sticks out, so your picture is not squashed. If you would rather keep the whole picture, choose “Fit inside and pad” and pick a padding colour. For a reference table of current sizes with notes on safe zones, read social media image sizes.
Which fit mode should I use?
- Stretch to exact size changes the width and height independently. Use it only when the new proportions match the old ones, or when a distorted result is acceptable.
- Fill and crop the edges keeps the proportions and removes the overflow, centred on the picture. Best for thumbnails and feed posts. Check that faces and text are not cut off.
- Fit inside and pad keeps the whole picture and adds white, black or transparent bars to reach the exact size. Best when nothing may be cropped, such as a product photo or a poster.
Do not enlarge photos and expect detail
Making an image larger than it was does not add detail. The browser fills in the extra pixels by guessing, so enlarged images look soft. It is fine for small increases, but if you need a large print, start from a larger original. Making images smaller is where this tool shines, especially before uploading to a website. Combine it with the Image Compressor to cut the file size further.
Privacy and limits
Everything happens in your browser. On phones the output is limited to roughly 16 megapixels because mobile browsers fail above that. On desktop, larger sizes work up to 10,000 pixels per side.