Website readiness profile · Snapshot 23 October 2026
primecursos.com.br
primecursos.com.br's public homepage, certificate and DNS checked against 31 practices and compared with 1,516 Education & Online Learning sites.
- Readiness index
- 75/100
- Ahead of
- 84%
- Practices observed
- 21/31
- Popularity band
- Top 50K
Education & Online Learning median 61
of measured Education & Online Learning sites
0 of 31 could not be measured
Chrome UX Report top-sites list
Readiness by lane
Green: primecursos.com.br. Thin bar: Education & Online Learning peer median.
Enable
100/100
Peers 75
Harden
68/100
Peers 54
Accelerate
65/100
Peers 57
Recover
0/100
Peers 13
Priority fixes for primecursos.com.br
Ordered by impact and by how common each practice is among peers.
Priority 1 · Accelerate
Modern image formats in use
Observed: The homepage had 90 images and none used WebP or AVIF.
Why it matters: WebP and AVIF are typically much smaller than JPEG or PNG at similar quality, and images are often the heaviest part of a page.
What to do: Serve WebP or AVIF with a JPEG or PNG fallback, either through an image CDN or by generating both formats at build time.
On Cloudflare: Cloudflare Polish can convert images to WebP.
32% of Education & Online Learning peers do this. Limit: Based on the homepage HTML delivered to an automated client; scripts that run later were not executed.
Guide: AVIF, WebP, JPEG, and PNG: Choose the Right Image Format
Priority 2 · Accelerate
Offscreen images lazy-loaded
Observed: The homepage had 90 images and none used loading="lazy".
What to do: Add loading="lazy" to images below the fold. Do not lazy-load the main hero image, because that delays the largest visible element.
52% of Education & Online Learning peers do this.
Priority 3 · Harden
Framing restricted
Observed: The homepage did not send frame-ancestors or X-Frame-Options, so other sites may frame it.
What to do: Send Content-Security-Policy: frame-ancestors 'self' (or a list of trusted origins). X-Frame-Options: SAMEORIGIN covers older browsers.
On Cloudflare: Add the header with a response header transform rule.
49% of Education & Online Learning peers do this.
Priority 4 · Accelerate
HTTP/3 advertised
Observed: The homepage did not advertise HTTP/3 through an Alt-Svc header.
What to do: Turn on HTTP/3 at your CDN. Browsers fall back to HTTP/2 automatically, so the risk is low.
On Cloudflare: Enable HTTP/3 (with QUIC) under Speed > Optimization > Protocol Optimization.
25% of Education & Online Learning peers do this.
What primecursos.com.br already does well
Practices fewer than half of Education & Online Learning peers use.
- HSTS kept for at least a yearHSTS with a 365-day max-age covering subdomains.34% of peers
- DMARC policy enforces quarantine or rejectDMARC policy p=quarantine.36% of peers
- Reachable over IPv6IPv6 address published.39% of peers
What we saw
- Homepage checked
- https://www.primecursos.com.br/
- Homepage response
- HTTP 200
- TLS
- TLSv1.3, HTTP/2
- Certificate
- Google Trust Services, 90-day validity, expiring 2027-01-09
- CDN or edge
- Cloudflare
- DNS operators
- Cloudflare
- HSTS
- max-age 365 days, includeSubDomains, preload
- DMARC policy
- p=quarantine
- Homepage HTML
- 102 KB, br
- Images on homepage
- 90 (jpg 87, png 3)
Limits: homepage only, one location, one moment. Header checks reflect the homepage response; other pages may differ.
Stack and providers
Seen in the homepage response, certificate and DNS. Provider pages compare how their customers configure the same checks.
All 31 checks
Select a gap for the method and fix. How each check works
Not observed 10
Observed 21
- HTTP requests move to HTTPS
- HSTS kept for at least a year
- TLS 1.3 negotiated
- Certificate has more than 14 days left
- Certificate lifetime of 100 days or less
- DMARC policy enforces quarantine or reject
- X-Content-Type-Options: nosniff
- HTTP/2 negotiated
- HTML compressed
- Static files cached for 30 days or more
- No render-blocking scripts in <head>
- robots.txt published
- XML sitemap discoverable
- Reachable over IPv6
- Canonical URL declared
- Meta description written
- Mobile viewport configured
- Structured data present
- Social preview image set
- Page language declared
- At most one redirect to the homepage
Own primecursos.com.br?
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Live status for this site: Status Is Down: primecursos.com.br. This profile covers configuration only.