ThumbFlip: A/B Test thumbnails to increase CTR on YouTube!!

YouTube creators often know that thumbnails matter, but updating them manually is annoying, time-consuming, and easy to forget. I wanted something simple: upload thumbnails, set a rotation schedule, and let it run automatically. As I built it, I realized how many creators face the same problem — especially smaller channels without access to YouTube’s internal A/B tools. So I focused on making ThumbFlip extremely easy: sign in with Google, pick a video, upload thumbnails, choose hourly/daily/weekly rotation, and walk away. The goal is to save creators time, remove the repetitive work, and help them increase CTR with real-world testing. I’m excited to hear feedback and continue improving it for creators of all sizes!