Ad resizer
Fit one picture to every ad size.
Drop in a finished picture and pick the sizes. Each one is fitted without cropping, or filled and cropped around the point you choose. Free, with no account, and your picture never leaves your computer.
What it does, and what it does not.
It fits one flat picture into each size, and nothing more. Fit keeps the whole picture and fills the space around it. Fill covers the size and crops the rest, and each size says how much of your picture it keeps.
It does not move anything inside the picture. A logo in a corner, a headline or a price stays where the picture puts it. In a size of another shape it shrinks or falls outside the frame.
Laying a size out again, with each part moved to where it fits, is a different job. eonik on your Mac does that from your layered file, and this guide shows how.
Where the sizes come from.
Facebook and Instagram. Meta’s sizes for image ads, read on 27 October 2026. Meta Ads Guide.
Google Display. Google’s 20 sizes for uploaded image ads, read on 27 October 2026. Each file is 150 KB or less. Google Ads Help.
These are the platforms’ numbers. Every size, its safe area and its file limits are in our guides to Facebook, Instagram and Google Display ad sizes.
Questions.
Is my picture uploaded anywhere?
No. Your browser reads, draws and zips it on your own computer. Nothing is sent to eonik or anyone else.
How do I resize an ad without cropping it?
Choose “Fit the whole picture, no crop”. The whole picture goes in as large as it fits. The space around it is filled with a blurred copy or a colour you choose.
Will my Google Display files be small enough?
Yes, or the tool says it could not do it. Google takes display files of 150 KB or less. Each display size is saved as a JPEG at the highest quality under that limit.
Why do my logo and price end up small or cut off?
Because this fits one flat picture. Your logo, words and price stay where the picture puts them. In a wide or tall size they shrink or fall outside. eonik on your Mac lays each size out again around those parts.
Can it resize a video?
No, this tool takes pictures. eonik on your Mac resizes video ads, laying each size out again.