How to choose an image size
Start with the placement where the image will appear. Square images are flexible for many feed placements, portrait formats use more vertical screen space, and wide images are common for link previews. Platform requirements can change, so verify the current specifications for your exact placement before publishing a campaign.
Fill or fit?
Fill canvas scales the image until the whole canvas is covered, which may crop some edges. Fit inside keeps the complete image visible but can leave margins around it. Review the preview and choose the option that preserves the message of your creative.
Privacy note
Image selection, resizing, and export happen locally in your browser. The image is not sent to a Pexuni server by this tool. Downloaded files may be larger or smaller than the original depending on the dimensions and output format.