All Ad Specs

Free searchable directory of hundreds of digital advertising specifications across many publishers.

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A free, searchable web directory of hundreds of digital advertising specifications from dozens of publishers. All Ad Specs gathers publisher dimensions and creative requirements into one place so media buyers, designers and marketers can quickly find accurate specs and reduce rejected creatives caused by inconsistent or scattered publisher listings.

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Full match profile

Behind the summary, Matchbox keeps a richer profile of All Ad Specs - the signals our matcher actually reads to decide when to surface it. It stays private; claim the listing to see and control it.

Problem & pain-point mapping
Who we surface it to (audience fit)
What it's a strong alternative to
Trust & credibility signals

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