Paste your tag

This fires every declared tracking URL directly, ourselves — bypassing IMA entirely, so nothing is hidden inside a sandboxed frame. That also means it's a reachability check, not a playback simulation: URLs fire immediately rather than at the real quartile/impression moment, and macros like [CACHEBUSTING] are substituted with placeholder values, not real user data. "Reachable" means the request completed — some ad servers correctly respond with an empty 204, which is normal, not a failure. Cross-origin browser rules mean we can't read the exact HTTP status code, only whether the network request itself succeeded or failed outright (DNS/connection error, blocked request, etc). Works for pasted VAST/VMAP XML, or a VAST/VMAP URI we can fetch directly.

HTML5/MRAID creatives don't declare click tracking in a structured spec the way VAST does — it's just JavaScript baked into the creative. This scans the pasted source for the common conventions: a global clickTag/clickTag2 variable, an anchor tagged with id="clickTag", or a Google Studio/CM360 Enabler.exit() call. Some ad-builder frameworks compute the real click URL from macros at runtime instead of writing it anywhere as text — those won't show up here from the static source alone, but running the creative once in Ad Preview lets this also check common globals (like window.clickTag or window.runtime_clickTag) after the ad actually initializes, which catches many of those. If a creative uses something else entirely for click handling, this won't find it either way — there's no reliable way to detect arbitrary custom code without actually clicking it.

Paste several VAST tag URLs (one per line, optionally with a label like 30s - in front or on the line above) and run the same checks as the VAST Trackers preflight on each one: tag structure, duration of every rendition against the VAST <Duration>, and flat or black frames at the start. Nothing is fired, so no impressions or clicks are counted. Each tag is requested several times (set below) and the responses are compared, because some ad servers answer differently from one request to the next. A tag that differs only now and then can be missed, so raise the number if you need to be sure. Each tag downloads up to about 4 MB for the frame check; untick the box to do duration only, which is a few KB per tag.

Paste one or more tags (VAST URLs, HTML5 tags or VAST XML), choose the vendor the tags are built for and, if there is one, the client. The tool lists which of the vendor’s expected macros are missing from each tag, which are written in the wrong syntax or case, and which macros in the tag it does not recognise. Nothing is fetched or fired. You confirm each missing macro is intended, or remember it as optional for that vendor. Separate several HTML or XML tags with a blank line.