Free ad resizer
Turn one ad into all 14 platform sizes: feeds, Stories and Reels, YouTube and web banners. Crop or pad each size, preview it, download it. It runs in your browser, so your image never leaves your device.
What this tool does, and what it does not
It does two honest things. Crop cuts your ad to the new shape and scales it to a standard export size. Fit shrinks the whole ad into the new shape and fills the empty space with a solid color. It does not redesign anything: your headline, product and logo stay exactly where they were. When an ad was built for a square feed, a crop to 9:16 or a fit into a 4:1 banner will show it.
That is fine for quick tests, for ads with a lot of background, and for checking how a creative reads in other placements before you commit to a full set.
Need every size re-composed, not cropped?
AdDogs rebuilds the layout for each ratio with your product and brand, so a 9:16 Story is designed as a Story instead of a cropped square. Pick from 14,000+ ad examples or upload any ad, add your product, and choose the dimension. Basic includes 3 ratios (1:1, 9:16, 16:9); Pro and Ultimate unlock all 14. New accounts get 3 free credits.
What each size is for
These are the same 14 aspect ratios AdDogs generates in. Platforms change their exact specs often, so treat this as a map of where each shape is used and check the current numbers in our ad sizes guide for every platform and the Meta ad sizes breakdown.
- 1:1 · Square (1080 × 1080)
- The safe default for feed posts. Square shows up cleanly almost everywhere an image ad can run.
- 2:3 · Portrait 2:3 (1080 × 1620)
- Tall pins and portrait placements that reward a vertical, poster-like layout.
- 3:2 · Landscape 3:2 (1620 × 1080)
- Classic photo landscape, for landscape feed images and photo-style creatives.
- 3:4 · Portrait 3:4 (1080 × 1440)
- A slightly squarer portrait, used for portrait posts and grids where 4:5 is not offered.
- 4:3 · Landscape 4:3 (1440 × 1080)
- A taller landscape that keeps more height than 16:9 in landscape feed placements.
- 4:5 · Instagram Feed (1080 × 1350)
- Portrait feed posts. Takes more of a phone screen than square, so it is the usual pick for mobile feed placements.
- 5:4 · Landscape 5:4 (1350 × 1080)
- Near-square landscape for feeds that crop wide images down.
- 9:16 · Stories/Reels (1080 × 1920)
- Full-screen vertical: Stories, Reels and short-video placements. Needs safe zones (see below).
- 16:9 · YouTube/TV (1920 × 1080)
- Landscape video and thumbnails, plus wide placements on desktop.
- 21:9 · Ultra Wide (2048 × 878)
- Ultra-wide hero and header banners where there is lots of horizontal room.
- 1:4 · Tall Banner (512 × 2048)
- Tall sidebar banners next to page content.
- 4:1 · Wide Banner (2048 × 512)
- Wide web banners across the top or bottom of a page.
- 1:8 · Ultra Tall (256 × 2048)
- Skyscraper-style strips. Same as 8:1: fit works, crop rarely does.
- 8:1 · Ultra Wide Banner (2048 × 256)
- Leaderboard-style strips. Expect to fit (pad) most ads here; a crop removes almost everything.
Crop vs fit: which one to use
Use crop when the ad has breathing room around its subject. Going from 4:5 to 1:1 only removes a strip from the top and bottom, and most portrait ads survive that. Use the focus control to decide which edge to keep: top for headline-led ads, bottom for ads with the offer or call to action at the foot, center for product-in-the-middle layouts.
Use fit when anything important touches the edges, or when the jump in shape is big. A square ad cropped to 16:9 loses almost half its height; fitted, it stays whole with bars on the sides. The edge-color option samples the border of your ad so the bars blend in. White is the cleaner choice for ads on a white background.
A rule of thumb: if the shapes are close (1:1, 4:5, 5:4, 3:4), crop. If they are far apart (square to 9:16, anything to a banner), fit, or rebuild the ad for that size.
Safe zones for Stories and Reels (9:16)
Full-screen vertical placements put the app on top of your ad: the account name and progress bar at the top, captions, buttons and the call to action at the bottom, and engagement icons down one side. Anything you put in those bands can be covered.
Keep the headline, logo, price and product in the middle of the frame, and leave the top and bottom for background. That matters twice here: a crop to 9:16 keeps a vertical slice of your ad, and a fit adds bars exactly where the interface sits, which can work in your favor. The exact margins differ by platform and change over time; the current numbers are in our ad sizes and specs guide.
How to resize an ad for every platform
- Step 1
Add your ad
Drop one finished ad (PNG, JPG or WebP) into the tool or choose it from your device. It stays in your browser.
- Step 2
Check what already fits
The tool shows the pixel size and ratio and lists any placement your ad already matches exactly or within 2%.
- Step 3
Pick crop or fit per size
Crop fills the frame and trims the edges; set the focus to keep the top, center or bottom. Fit keeps the whole ad and pads the rest with the edge color or white.
- Step 4
Download
Save each size as PNG or JPG, or download all 14 at once. Files are named with the ratio and pixel size.
FAQ
Yes. There is no sign-up, no watermark and no limit. The tool runs entirely in your browser, so it costs us nothing to run and your image is never uploaded to our servers.
Crop when the important parts (product, headline, logo) sit near the middle and the edges are background. Fit when text or the product runs close to the edges, or when the target ratio is very different, like a square ad going into a wide banner.
Most sizes export at 1080 pixels on the short side, for example 1080 × 1350 for 4:5 and 1080 × 1920 for 9:16. Ultra-wide and banner ratios export with a 2048-pixel long side.
Scaling down keeps your ad sharp. Scaling up a small image will soften it, so start from the largest version of your ad you have. PNG keeps every pixel; JPG files are smaller.
No. This tool only crops or pads. It never moves your headline, product or logo. If you need each ratio re-composed, AdDogs generates the ad natively in the ratio you pick, with your product and brand.