Free Tool
HTML5 Banner Validator
Upload your ad ZIP. We check it against Google, The Trade Desk, and Adform specs before it goes to trafficking.
Runs entirely in your browser. Nothing gets uploaded anywhere.
Campaign Targets
Drop your banner ZIPs here
or click to browse — add as many as you need
Standard ZIP bundles, up to 10MB
Waiting on a banner
Pick your target platform, then upload a ZIP to run the check.
What we're checking against
Size & File Structure
- —Under 150KB–500KB initial load
- —100 file limit max per archive
- —Primary index.html file in ZIP root
- —No Mac OS / system metadata files
ClickTag & Code
- —Up to 6 valid clickTags
- —Target clickTag in primary window
- —HTTPS required across all assets
- —Standard ad.size meta tag present
Asset Integrity
- —Formats: .png, .jpg, .svg, .gif, .js, .css
- —Framerate under 30 FPS recommended
- —No synchronous local storage access
- —Editable static fallback image included
Need someone to actually fix it?
We build banner sets that pass first time, every time.