Maestro LinkedIn Ad Mockup

Maestro LinkedIn Ad Mockup is a free, browser-based editor for reviewing a LinkedIn single-image ad before anyone builds it in Campaign Manager. You add the company name, introductory text, creative, headline, optional description, call to action and destination URL, then compare how the ad reads in desktop and mobile feed views. No sign-in is required, and you can start from a blank ad or load a worked example that shows every field in context. The tool separates LinkedIn's recommendations from its published maximums. Going past a recommended length, such as about 150 characters of introductory text or 70 characters of headline to reduce truncation risk, produces a warning. Going past a published maximum, such as 3,000 characters of introductory text or 200 characters of headline, blocks the review export until the field is fixed. It also checks image ratios for landscape (1.91:1), square (1:1) and portrait (4:5) creative, flags an invalid destination URL or missing alt text, and treats portrait as a mobile-only placement instead of pretending it will serve on desktop. A status panel keeps four decisions apart: whether the draft can be previewed, whether the supplied copy, URL and image pass the supported rules, whether the production handoff is complete enough for a named reviewer, and whether LinkedIn itself has approved the ad. A local preview is never presented as launch approval. When the review is done, you download the mockup image, a production brief and a structured record, and share them with whoever approves copy, creative and destination. That gives marketers, founders and agencies one clear artifact to discuss instead of a thread of screenshots. The preview is a practical approximation for creative review. It is not an official LinkedIn preview and does not predict approval, delivery or performance, so final eligibility and placement checks still belong in the intended Campaign Manager account. The current version supports website-feed single-image ads with JPG or PNG files.