Validate HTML5 banners for The Trade Desk
Free in-browser validator for The Trade Desk HTML5 banners. Check the 200 KB size limit, clickTag, dimensions, required scripts and external URLs against The Trade Desk's real upload requirements before you submit — no upload, no account.
Upload your The Trade Desk banner
ZIP, a single HTML file, or pasted code.
Add a banner to validate it for The Trade Desk
Everything runs in your browser — files never leave your machine.
The Trade Desk HTML5 banner requirements
Supported by Viewst- Package size limit
- 200 KB
- Click integration
- query-param clickTag (getParameterByName)
- Required vendor scripts
- none
- External URLs
- Permitted — external references are allowed (flagged for your awareness).
Requirements last verified · sourced from Viewst's live ad-network export pipeline.
The Trade Desk HTML5 banners — frequently asked
What is the file size limit for The Trade Desk HTML5 banners?
The Trade Desk HTML5 banners must be 200 KB or smaller. The limit applies to the packaged ZIP archive submitted to the ad server — every image, font and script bundled inside counts toward it. Banner Check measures the compressed weight and flags an error if it exceeds 200 KB.
How do I implement the click handler for The Trade Desk HTML5 banners?
The Trade Desk reads the click URL from the ad-request URL via getParameterByName("clickTag") rather than a hardcoded variable. Don't bundle a clickTag value yourself — the ad server passes it as a query parameter.
Why does The Trade Desk reject HTML5 banners?
The Trade Desk rejects HTML5 banners for a package over 200 KB; a missing or malformed clickTag; a missing <meta name="ad.size"> tag; banner dimensions that don't match the declared size; or external assets that fail to load when the ad serves. Banner Check checks all of these in your browser before you upload.
Does this validator upload my banner files?
No. The validator runs entirely in your browser — your banner files never leave your machine. There is no upload, no account and no backend.
Preflight The Trade Desk creatives before you upload
Ad networks reject HTML5 creatives for small, avoidable reasons — an oversized package, a missing clickTag, the wrong banner dimensions, or an external font URL. This free validator checks your banner against The Trade Desk's real requirements in the browser, so you catch problems before the ad server does. It is built by Viewst, an AI ad-production platform that exports The Trade Desk-ready HTML5 banners at scale.
Need to check a different network? Use the full Banner Check to pick from every supported ad network, or jump to one below.