YouTube Thumbnail Tester & Previewer
YouTube thumbnail CTR optimizer. Preview thumbnails in the real YouTube feed, compare against competitors, and optimize for maximum click-through rate.
Added April 13, 2026
· Last analysed April 13, 2026 · via 
· 57% unique tagline
StackScope is a free public catalogue of indie launches. We find launches on Product Hunt, Hacker News and similar feeds, then crawl each site to detect its tech stack and score it for launch readiness: DNS, security headers, SEO basics. This page is what we saw on 13 April 2026; the live site may have changed since.
YouTube Thumbnail Tester & Previewer ships with the launch fundamentals in place, with a thorough launch checklist and clean crawl signals. Worth fixing first: no Permissions-Policy, incomplete legal pages, and no email security records.
Launched on Product Hunt on April 3, 2026. The site is hosted on Vercel. We've detected 8 technologies on this site, covering CSS frameworks, DNS providers, web fonts, and frameworks. The stack includes Next.js, React, and Tailwind CSS.
It's running the same core stack as 10,661 other launches and tighter on security headers than most Product Hunt launches.
If you own this site, refresh the snapshot and see the full fix list any time →
Tech Stack (8)
| DNS |
Cloudflare DNS
|
| Hosting |
Vercel
(2)
|
| Security | HSTS (2) |
| CSS framework |
Tailwind CSS
|
| Font |
Google Fonts
|
| Framework |
React
|
| Meta-framework |
Next.js
(3)
|
| SEO |
Google Search Console
|
Infrastructure
Email Security
Readiness Breakdown How?
Vibe Score Breakdown How?
| Signal | Points |
|---|---|
| AI copy signals | +5 |
| AI palette signals | +5 |
| AI stack signals | +10 |
This score is based on structural patterns and is not definitive. Many legitimate sites may trigger signals, and AI-built sites may go undetected. It should be treated as an indicator, not a verdict.