Bulk creative asset checker
Check banner dimensions, formats, and file weights in one batch. Find missing sizes and filenames that do not match the image.
Choose your images, set the expected sizes, and review the exceptions before sending the assets onward.
Your inputs stay in this browser tab. Files and tags are processed in an isolated workspace, without advertising or analytics scripts.
How to use it
- Add JPG, PNG, GIF, or WebP files. You can select a folder or drop several files at once.
- Choose a size checklist and enter the file-weight limit from your publisher or platform specification.
- Review missing sizes and flagged files, then download the complete CSV report.
Worked example · sample data
A file called summer_728x90.png contains a 300 × 250 image. The checker reads 300 × 250 from the image header, flags the filename mismatch, and reports 728 × 90 as missing if it is on your checklist.
Before you use the result
Dimensions come from the file header, not the filename. A readable header does not prove that the full image is undamaged.
File-weight limits vary by publisher and format. The default is an editable example, not an industry-wide specification. KB means 1,000 bytes.
This tool does not check animation length, flashing, visual content, backup-image pairing, or platform approval. Check those against the placement requirements.