Resize Images and Change Aspect Ratios in Canva

Before you start

Open the design that contains the image you want to resize. Canva runs as a service, so the process happens in your account while you are online. Resizing a single image or changing the design dimensions does not require extra files on your device, but you do need a stable connection and access to the design. If you only have an uploaded image outside a design, place it into a design first before changing its size or shape.

Step-by-step instructions

• Open the design containing the image.
• Select the image by clicking it once.
• Look for the controls that allow changing size. Drag a corner handle to resize while keeping the current proportions.
• To change the design aspect ratio, open the resize or design settings for the project and choose the target format or enter custom pixel dimensions.
• If the design supports the action, choose whether to resize the current design or create a copy.
• Review the preview before applying the final size.

The exact wording and position of resize controls can vary between the desktop browser version and mobile apps. If you do not see a resize option for the whole design, check whether the active element is the image or the page background.

Check the output

After resizing, check the image at normal viewing size. Make sure the main subject is not cut off and that text or important details remain inside the visible area. If you changed pixel dimensions, confirm those dimensions are suitable for where the image will be used, but do not rely on a stated pixel size alone as proof of quality.

Export limitations depend on the file format and the project settings. Some formats support transparency, while others do not. Compression can also affect the result. Check the final export by opening the downloaded file instead of judging quality only from the Canva preview.

Common problems and next steps

If the image looks stretched, undo the change and try dragging from a corner again, because side handles can break the original aspect ratio. If resizing makes the subject too small, either resize the design to a closer aspect ratio or move and crop the subject before exporting.

When you need a specific pixel dimension, select a preset that matches the target ratio and then check the available custom size option. If transparency is required, confirm that the chosen file format supports it before download. For lossy formats, use the lowest compression that still gives an acceptable file size.