Test the ad.
Scan the site.

Check an ad tag before it goes live, or see every pixel a website fires, decoded.

Decodes

Ad Tag Tester

Waiting for a tag 0 chars
Drop an .xml, .html or .txt file here
Behaviour

How it
works

  1. Ad tags. Paste a tag, VAST or URL. It runs in a sandbox that records every request, click and error.
  2. Websites. Enter a URL. A real Chrome loads it, accepts the cookie banner and records every tag on both sides.
  3. Read. Checks, decoded parameters and account IDs. Share a link or export JSON.

Privacy

Ad tags run in your browser. Site scans use a throwaway browser. Nothing is stored.

Visibility

Requests inside cross-origin iframes can’t be seen from a web page. TAGSCOPE flags those frames.

Limits

Pixels you fire are real. Full site scans are limited to about 30 a day.

Support

Keep TAGSCOPE
free & running

No ads, no tracking, no account. If it saved you some debugging, a coffee keeps it going.