- Blurry Google ads are almost always caused by undersized images that get stretched to fit larger placements.
- Use at least 600 × 314 px for landscape and 300 × 300 px for square — larger originals always compress cleaner.
- Export as PNG to survive Google's recompression with the least quality loss.
- Google's built-in upscaling AI helps slightly undersized images, but struggles with screenshots or heavily compressed files.
- AI Upscale in Coinis Revise sharpens low-res ad images in one click — no re-sourcing required.
Blurry Google ads hurt performance and risk disapproval. The fix is usually faster than you think.
Why Your Google Ads Become Blurry
Blur isn't random. It has a direct cause. Knowing it cuts your fix time in half.
Image scaling and resolution loss
Google serves ads across thousands of placements and screen sizes. When your source image is too small, Google stretches it to fit. Stretching multiplies pixels. That multiplication creates visible blur and pixelation.
File compression and export issues
Design tools like Canva compress images by default on download. The file looks fine in the interface. By the time Google recompresses it for delivery, quality has dropped a second time. Two rounds of compression leave you with a soft, muddy image.
Undersized source images
Per Google's Ads Help Center, Responsive Display Ads require a minimum of 600 × 314 px for landscape and 300 × 300 px for square images. Uploading smaller files forces Google to upscale them. The result is blur. Starting larger gives the platform more data to work with.
Screenshots and cropped images
Screenshots are low-resolution by nature. Cropping reduces pixel count further. When Google resizes a screenshot for a banner placement, the pixelation is hard to miss. Always use original source files.
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How to Fix Blurry Google Ads: The Main Steps
Work through these in order. Most fixes happen at step one or two.
Step 1: Use the largest recommended image dimensions
For best performance, Google recommends 1500 × 1500 px for product images. For Responsive Display Ads, the hard minimums are 600 × 314 px landscape and 300 × 300 px square. Start as large as possible. Large originals compress better and scale cleaner across every placement.
Step 2: Export images in high-quality PNG format
PNG preserves more detail than JPG. When Google recompresses your image for different placements, a PNG starting point loses less quality. Export at the highest resolution your design tool allows.
Step 3: Replace undersized images with source files
If you have access to original photography or vector files, use those. Resize down from large, not up from small. Resizing down keeps sharpness. Resizing up creates blur every time.
Step 4: Use AI upscaling to enhance low-resolution images
No original file? AI upscaling is your fastest fix. Coinis Revise includes AI Upscale, which sharpens and enlarges low-resolution images using premium AI models. Upload your blurry ad image, run AI Upscale, and download a sharper version ready to re-upload to Google Ads. One click. No design software needed. Note that Coinis doesn't publish directly to Google Ads today, but the upgraded image is yours to download and use anywhere.
Step 5: Test across devices and placements
Ad previews inside Google Ads Manager can look blurry even when live placements render cleanly. Always test on actual devices. Check desktop, tablet, and mobile before calling it done.
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Google's Built-In Image Upscaling Enhancement
Google has its own AI upscaling tool built into the Ads platform.
How the AI upscaling feature works
Per Google's Ads Help Center, the image upscaling enhancement increases image size while maintaining visual integrity. It brings undersized images up to meet minimum requirements for the campaign type. Google states that quality images at the correct dimensions can improve Ad Strength, clickthrough rate, and conversions.
When Google applies upscaling automatically
Google applies this enhancement automatically when an uploaded image falls below minimum size requirements for the campaign. You don't opt in manually for most campaign types. It runs in the background before your ad serves.
Limitations and when manual fixes are needed
Google's upscaling works best on images that are only slightly undersized. If your source image is very low resolution, such as a screenshot or a heavily compressed export, the AI has less data to work with. The result may still appear blurry. Manual fixes with a dedicated AI upscaling tool give you more control and typically produce sharper results.
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Best Practices to Prevent Blurry Ads
Start with high-resolution originals
Always begin with the largest file you have. Stock photography, original product shots, and vector exports at maximum resolution all give you a clean starting point.
Match image aspect ratios to ad placements
Google's Responsive Display Ads support landscape (1.91:1) and square (1:1) images. Forcing a mismatched ratio causes cropping or letterboxing. Both introduce visual quality problems.
Verify quality before uploading
Zoom in to 100% in your design tool before exporting. If the image looks soft at full size on screen, it will look worse after Google compresses it again.
Avoid text-heavy images with small fonts
Small text degrades faster than other image elements during compression or stretching. Keep text large and bold. Use your headline and description fields for detailed messaging rather than embedding it in the image. Google's own policy flags ads where text appears small or blurry.
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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
Why does my Google ad look blurry even though the image looks fine on my computer?
Your image may meet your screen's resolution but still be too small for Google's placement requirements. Google stretches undersized images to fill ad slots, which causes visible blur. Check that your image meets the minimums: 600 × 314 px for landscape or 300 × 300 px for square Responsive Display Ads, and always aim larger.
Does Google automatically fix blurry ad images?
Google's built-in image upscaling enhancement can resize slightly undersized images automatically to meet minimum requirements. But it has limits. Very low-resolution images, screenshots, and heavily compressed files may still appear blurry after automatic upscaling. For those cases, manually upscaling before upload gives better results.
Should I use PNG or JPG for Google Ads images?
PNG is the better choice when image quality is the priority. PNG preserves more detail than JPG, which means it loses less quality when Google recompresses it for delivery across different placements. JPG is acceptable for photos with no transparency, but start with the highest-quality export you can produce.
Can I fix a blurry ad image without finding the original file?
Yes. AI upscaling tools can sharpen and enlarge a low-resolution image without the original source file. Coinis Revise includes an AI Upscale tool that enhances image quality in one click. Download the improved image and re-upload it to Google Ads.