Image Ratio Checker

Image Ratio Checker is a free online tool to check image pixel dimensions and aspect ratios. Paste image URLs or Google Drive links to instantly verify ratios — including whether an image meets the YouTube thumbnail spec (1920×1080+, JPG, 16:9). Results can also be exported as CSV.

• Check image ratios via URL or Google Drive link
• Drag & drop image files directly
• Verify against a custom target ratio in real time
• YouTube thumbnail spec check (1920×1080+, JPG, 16:9)
• Crop to ratio & download
• Export results as CSV
• Korean / English supported

What image links can I use?

Any directly accessible image URL (JPG, PNG, GIF, WebP, etc.) and Google Drive share links are supported. Drive links are converted automatically.

How many images can I check at once?

Up to 100 URLs can be processed in a single batch.

Can I upload image files directly?

Yes — drag & drop files onto the drop zone, or click it to browse. JPG, PNG, GIF, and WebP are supported.

What is YouTube Thumbnail Mode?

It checks images against YouTube's recommended spec: 1920×1080 or higher, JPG format, 16:9 ratio.

An image shows as an error. What should I do?

Make sure the URL is correct and publicly accessible. Some servers block cross-origin (CORS) requests from browsers.

What is the "Crop to Ratio" feature?

Click the crop button next to an image result to trim it to the target ratio and download it.

Can I export results as CSV?

Yes — after checking, click the Download CSV button at the top right of the results to download a CSV file containing URL, resolution, ratio, format, and match status.

An image shows as WebP after drag & drop, but the original isn't WebP.

When dragging an image from a browser tab, the browser may automatically convert it to WebP. This may not reflect the actual file format. To avoid this, paste the URL directly or download the image file first, then drag it in.