All Ad Specs puts nearly 600 ad formats from 36 platforms on one free site, which beats opening eleven help centres before every campaign

Every marketer has lost twenty minutes to the same ritual: what size is a TikTok in-feed video again, how long can the headline be, and where does the caption cover the product shot? The answers live in a different help centre for every platform, each laid out differently. All Ad Specs puts them on one site with the same layout every time.

Pick a publisher, pick a format, and you get a tidy card: dimensions, aspect ratios, file size cap, accepted formats, codecs, copy limits and safe-zone notes, plus a link to the source. The coverage is broader than you might expect, stretching past the usual social suspects into connected TV, audio and retail media. For anyone writing a creative brief across several channels, that is a real time saver.

Where it shines

The best part is the sourcing. Every format page links straight to the publisher's official spec, and the site says entries are re-checked when guidelines change. That makes it a fast first answer and a shortcut to the original in the same click, which is exactly what you want the night before a launch.

The range is the other pleasure. Meta, TikTok, Google Ads, YouTube and LinkedIn sit next to Netflix, Roku, Walmart Connect, ChatGPT ads and the IAB standards. If your media plan has wandered into streaming TV or retail media, the sizes you need are already waiting.

Worth a bookmark

It costs nothing, needs no login and answers the question in seconds. Pin it next to your design tool and hand the link to the freelancer who keeps sending the wrong aspect ratio.

The spec sheet you should have bookmarked years ago, with the official source one click away.

The verdict