From one URL,
five steps
What actually runs at each step, and why.
Drop the URL (free)
Just enter the domain — yoursite.com. No signup, no login, no card on file. We lightly validate the host then queue the scan immediately.
- ·Missing the https:// prefix? We add it automatically.
- ·Hosts are scoped per subdomain (m.example.com and example.com are separate).
Lighthouse + PSI auto-scan
We call Google's official PageSpeed Insights API. Lighthouse runs under the hood, but going through PSI controls for browser / network / CPU variance, so the score is more consistent than running Lighthouse locally. One call collects the mobile score, Core Web Vitals (LCP, CLS, FID), per-audit savings estimates, and the per-file evidence at once.
- ·Lighthouse Performance score (0–100)
- ·Estimated milliseconds saved — per audit
- ·Per-audit evidence: exactly which file is how heavy
Automatic stack detection
Response headers + HTML fingerprint run together to detect the platform. WordPress, Cafe24, gnuboard, imweb, Shopify, Next.js, Nuxt, React — Korean and international stacks alike. Multi-stack matches (e.g. Next.js front + headless WP) all surface.
- ·Response headers (Server, X-Powered-By, Set-Cookie, …)
- ·HTML fingerprint (script paths, meta tags, class patterns)
- ·Detected stack drives the priority of every recommendation
Pay → unlock
Before payment you see 2–3 of the highest-severity issues blurred. After payment, all 5–12 recommendations appear on a single page in "reason + action + savings estimate" format. Actions are stack-specific (a WordPress site gets "enable WP Rocket's Delay JS option and …" — not generic advice).
- ·Checkout via Lemon Squeezy with VAT handled automatically
- ·The same page unlocks instantly after payment
- ·Result URL is permanent — share with designer / dev / agency
Re-run forever
Once a host is paid, it stays unlocked permanently. Apply the fixes, then re-scan to confirm the score moved and which issues actually closed. Same domain costs nothing on every re-run.
- ·Use it for before/after comparison (great for verifying contractor work)
- ·No subscription, no auto-renewal — ever
- ·Different domain = a fresh $29 for that domain