Free Safe Zone Checker & HTML5 Validator

What it does

Stop guessing and endless revisions. Instantly preview UI danger zones for TikTok, Reels & Shorts, or validate HTML5 banner ads (size, clickTag) via drag-and-drop. 100% browser-based, zero uploads, complete privacy for your unreleased campaigns.

Free creative QA tools for marketers and ad ops teams. Validate banners, compress ZIPs, preview safe zones, repair clickTags and build campaign URLs.

Inspect, optimize and preview campaign creative in one private browser workspace built for fast delivery. Open the exact task you need. No account, project setup or upload queue. Prepare HTML5 creative and remove the problems that block trafficking. See the creative in context and export the assets a delivery team needs. Build clean tracking and find the specifications behind each decision. AdCheckLab brings production checks into a single browser workspace. Start with a file, make the decision and move the creative forward. AdCheckLab grew from daily work in digital marketing and ad operations, where small creative mistakes cause slow approvals and rejectedfrom adchecklab.com

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