Check technical requirements
See exact dimensions, file weight and a clear pass, warning or error status for every creative.
01 Free online banner checker
Check every banner.
Fix it in one click.
Validate image dimensions and file weight for Google Ads, Meta and publisher placements. Resize, compress and download corrected creatives without uploading anything.
FormatsGoogle AdsMetaIABPublishers
New checkProcessed locally
Drop your banners here
or browse your files to check multiple images
JPG · PNG · GIF · WEBP · AVIF · SVG02 Active specification
Accepted banner formats
03 Validation report
Results
0Total
0Ready
0Warning
0Errors
Upload banner images to start the check.
04 Ad delivery made simple
One banner checker for Google, Meta and publishers
BannerCheck compares every image with the selected advertising specification, identifies the nearest accepted format and can create a corrected JPEG at the required dimensions and file weight.
Repair and compress
Resize banners to the nearest accepted format and reduce JPEG weight directly in your browser.
Download in batches
Export one corrected file or download repaired and approved banners together in a ZIP archive.
Your creatives stay on your device
Banner analysis, resizing, compression and ZIP creation happen locally in this browser. Your campaign files are never uploaded to our server.
Frequently asked questions
About the banner checker
Which banner formats can I check?+
The tool includes uploaded Google Display formats, Google responsive assets, common Meta placements, IAB display units and publisher formats.
What happens when I repair a banner?+
The image is resized to the nearest accepted dimensions and exported as a static JPEG. If necessary, quality is reduced until it meets the active file-weight limit.
Are animated GIFs preserved?+
GIF dimensions and weight can be checked, but repair exports the first rendered frame as a static JPEG. Keep the original when animation is required.
Should I confirm requirements with the publisher?+
Yes. Publisher rules can differ. Select the closest profile here, then confirm campaign-specific requirements with the destination platform or publisher.