All Ad Specs - Ad Specs Tester

Ad Specs Tester is a free tool from All Ad Specs. It checks an ad creative against thousands of placements from Facebook, Instagram, TikTok and other publishers.

A user drops in an image, video, audio file or HTML5 zip, then picks a placement and a preview device. The tool compares the file with the placement's requirements for size, format, safe zones and copy limits. Each check shows the measured value, the required value and whether it passes.

The tool can also check a VAST tag by fetching the tag and its wrappers in the browser. Where an ad server blocks that request, the user can paste the XML instead. Results can be exported to PDF.

Files stay in the browser and are not uploaded. Visitors get three free checks per day, and signing in with an email address raises the limit to 50 checks per day.