How to resize an image without stretching it
Changing the width and height independently can stretch a photo. To keep its proportions, use the aspect ratio control. If you need a different shape, crop the image before resizing it.
Open Resize Image ↗Resize while keeping the proportions
- Open Resize Image and choose your supported image files.
- Keep the aspect ratio option enabled, then enter a width or height. The other dimension is calculated from the original image.
- Choose your output settings, run the tool and download the result. Multiple image outputs are packaged in a ZIP.
Pixels and percentages are different ways to set the size
An image that is 1200 × 800 pixels has a 3:2 aspect ratio. Setting its width to 600 while keeping that ratio gives a height of 400. Resizing the same image to 50% gives the same 600 × 400 result.
If you enter both 600 × 600 and disable the aspect ratio option, that 3:2 image becomes square and its contents are stretched. Exact dimensions describe the output canvas; they do not automatically preserve the original subject’s proportions.
Need a square photo? Crop first
For a square profile picture, open Crop Image and choose the area you want to keep. Use a square region, download the crop and resize that square to the required dimensions. This removes part of the image without distorting what remains.
Cropping cannot include every part of a wide photograph inside a square without removing content or adding borders. Decide whether keeping the whole scene or filling the requested shape matters more.
Resizing is not the same as recovering detail
Making an image larger changes its dimensions but cannot restore detail that was never captured. Upscale Image uses a local super-resolution model to estimate extra detail, with smaller input limits than ordinary resizing. Generated detail can differ from the original.
For smaller download sizes at the same dimensions, try Compress Image instead. Keep a copy of the original and avoid repeatedly saving a JPG at lower quality if crisp text or edges matter.
Check formats and the downloaded result
Animated GIF resizing processes every frame. Other output formats may use the first frame. Review the tool’s supported formats and note before converting an animation. A batch can contain files with different original dimensions, so inspect the resulting images.
Check the downloaded image’s actual width and height, not just how large it appears on a screen. A browser can display a large image at a small visual size. OhhPDF processes the pixels on your device; this workspace is excluded from analytics recording.
Tools used in this guide
Read how local processing and optional browsing analytics work.