AdCheckLab
for marketers
AdCheckLab
for marketers
Built by a digital marketer who got tired of avoidable mistakes
AdCheckLab was built out of daily frustration. Working in digital marketing and ad operations, I kept seeing the same problems over and over: videos going live on TikTok with text buried under the like button, HTML5 banners getting rejected for missing clickTags or platform specific packaging errors, and clients approving creative that looked clean on desktop but was unusable in-feed.
Every fix meant opening a new browser tab, searching for yet another resource, and hoping the numbers you found were actually current. Platform UIs change. Safe zone guides go stale. There was no single tool suite that let you drop in a file and immediately test safe zones, validate display banners, calculate aspect ratios, and generate clickTags, without uploading anything to a server or requiring a login.
So I built one. Then I expanded it into a full creative and ad ops utility suite.
The Safe Zone Checker overlays platform specific danger zones directly onto your video or image. It covers TikTok (Feed and Ads), Instagram Reels (Feed and Ads), Instagram Stories, YouTube Shorts, Snapchat, and TV Broadcast, with exact pixel measurements derived from testing against live platform UIs at 1080×1920.
The HTML5 Banner Validator runs pretrafficking QC checks: clickTag and ad.size presence, current platform specific ZIP and file-count limits, IAB format identification, GIF behavior, and backup image recommendations.
The clickTag Generator & Code Fixer produces ad-server compliant code for Google Ads, Campaign Manager 360, and DV360.
The Aspect Ratio Calculator scales dimensions and calculates letterbox padding.
The Safe Zone PNG Masks provide downloadable transparent guide overlays for Premiere Pro, DaVinci Resolve, and CapCut.
Every tool runs 100% in your browser using native APIs (HTML5 Canvas, File API, JSZip, and native video decode). Neither your creative files nor your videos ever touch an external server.
Once loaded, the tools work fully offline.
Content creators, motion designers, social media managers, media buyers running pre-launch QC on HTML5 creatives, and ad ops teams needing fast pretrafficking verification.
Questions or feature requests: filip.djordjevic447@gmail.com or visit our Contact page.
If the suite saves you time, a coffee is always appreciated.