Quick answer: Google feed ads need three aspect ratios. Landscape (1.91:1) at 1200×628 pixels. Square (1:1) at 1200×1200. Portrait (4:5) at 960×1200. Files must be JPG or PNG, under 5MB. Use Smart Resize in Coinis Revise to nail every ratio without distortion or quality loss.
Why Resizing Google Feed Ads Matters
Wrong dimensions break your ad before anyone clicks it.
Feed ad placements span multiple environments
Google feed ads run across Google Discover, Gmail, and Performance Max campaigns. Each environment renders images differently. One bad crop and your product disappears off-frame.
Wrong dimensions cause distortion, lost visual impact, and lower engagement
Distorted images signal low quality. Low quality signals low relevance. That hurts your placement odds before your budget even starts working.
Aspect ratio consistency determines CTR and engagement
Per Google's Ads Help Center, images must match accepted aspect ratios to appear in feed placements. A mismatched ratio does not auto-fix. It forces a crop that may cut your product, headline, or face entirely.
The Three Feed Ad Dimensions You Need
Cover all three formats to maximize reach across every feed placement.
Landscape (1.91:1): 1200×628 pixels recommended
Landscape is the most common feed format. Recommended size is 1200×628 pixels. Use JPG or PNG. Max file size is 5MB.
Square (1:1): 1200×1200 pixels recommended
Square images work well across Discover and Gmail feeds. Recommended size is 1200×1200 pixels. The minimum Google accepts is 300×300. Larger images always perform better in feed environments.
Portrait (4:5): 960×1200 pixels recommended
Portrait format carries strong visual weight in mobile feeds. Recommended size is 960×1200 pixels. Minimum accepted is 480×600. Google added this ratio after aligning with social media ad formats.
Minimum quality thresholds and file size limits
All images must be JPG or PNG. Maximum file size is 5MB per image. Images under 1200 pixels wide reduce your chance of appearing in Discover and other feed placements. Performance Max campaigns accept up to 20 images per asset group across all three formats.
Method 1: Resize Manually in Google Ads
Google's campaign builder includes a basic image editor. It works, with trade-offs.
Step 1: Upload your image to Performance Max or Discover campaign
Open your campaign in Google Ads. Navigate to the asset group. Upload your image in the Images section.
Step 2: Google's platform auto-crops to aspect ratios
Google auto-crops your image to fit each accepted ratio. You do not control the crop point. The platform guesses what matters most in your frame.
Step 3: Preview across placements and adjust composition if needed
Use the preview tool to check each auto-cropped version. If key elements are cut, you need to fix the source image and re-upload.
Pros and cons of manual resizing
Pro: built in, no extra tools needed. Con: zero control over crop quality. Auto-crop frequently removes text near edges or clips product details. For anything beyond a simple background image, the result often needs manual fixing anyway.
Method 2: Resize with Coinis Revise (Recommended)
Smart Resize in Coinis Revise handles all three Google feed aspect ratios without guesswork.
Why Smart Resize preserves quality and composition
Smart Resize is aspect-ratio-aware. It preserves your focal point and avoids the edge-clipping that Google's auto-crop causes. No quality loss. No distortion. You see exactly what you export.
Step-by-step: Upload, select target aspect ratio, get resized image in seconds
- Open Coinis Revise.
- Upload your ad image.
- Select your target ratio: 1.91:1, 1:1, or 4:5.
- Download your resized image in seconds.
That is the full process. No design skills required.
Batch-resize multiple images for multi-variant campaigns
Running several image variants? Resize them all in one session. Feed-ready files for every format, every variant. No repetitive manual work.
Export and upload to Google Ads
Download the resized images directly from Revise. Upload them to your Performance Max or Discover campaign. No format conversion needed.
Pro Tip: Generate Feed-Ready Ads from Scratch
Skip resizing entirely. Start with images built at the right dimensions.
Use Image Ads to generate feed-ready creatives at optimal dimensions
Coinis Image Ads generates ad creatives at 1200×628, 1200×1200, and 960×1200. Enter your product URL. Pick your format. Get a feed-ready image.
No resizing needed
Images come out at the correct dimensions for every Google feed placement. No cropping. No distortion. No 5MB surprises at upload.
Faster path for high-volume ad creation
Need 10 variants across three ratios? Image Ads handles the generation. One product URL, multiple formats, no manual resizing involved.
Common Mistakes to Avoid
Small errors here waste budget and cut placement rates.
Uploading low-res images
Images under 1200 pixels wide reduce your chance of appearing in Discover feeds. Always start with a high-resolution source file before resizing.
Ignoring aspect ratio
White space and distortion both signal poor creative quality to the algorithm. Always match the required ratio exactly. Never stretch to fit.
Using wrong file formats
Google accepts JPG and PNG only for feed ads. No WebP. No GIF. No SVG. Wrong formats are rejected at upload with no warning about why.
Exceeding the 5MB file size limit
Files over 5MB are blocked during upload. Compress your image before uploading if needed. High-resolution does not require a bloated file size.
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Or skip the steps.
Coinis Revise edits any ad image with AI. Move text. Change text. Swap colors. Erase objects. Translate to any language. One click each.
No design skills. No Photoshop. One click.
15 AI tokens a month. No credit card.
Frequently Asked Questions
What is the best image size for a Google feed ad?
The recommended sizes are 1200×628 pixels for landscape (1.91:1), 1200×1200 pixels for square (1:1), and 960×1200 pixels for portrait (4:5). Covering all three formats gives your ad the best chance of appearing across Discover, Gmail, and Performance Max placements.
Can I use the same image for all Google feed placements?
No. Each placement expects a specific aspect ratio. Using one image for all formats forces Google to auto-crop, which often cuts important visual elements. Resize your image to each required ratio before uploading for best results.
What file formats does Google accept for feed ads?
Google accepts JPG and PNG only for feed ad images. Maximum file size is 5MB per image. Other formats like WebP, GIF, or SVG are not accepted.
What is the minimum image size for Google Discover feed ads?
Google recommends at least 1200 pixels wide for Discover feed placements. Technically, the minimum for square format is 300×300 and for portrait it is 480×600, but images below 1200 pixels wide are less likely to appear in high-quality feed placements.