Website readiness profile · Snapshot 23 October 2026
ucm.es
ucm.es's public homepage, certificate and DNS checked against 31 practices and compared with 1,516 Education & Online Learning sites.
- Readiness index
- 58/100
- Ahead of
- 40%
- Practices observed
- 15/31
- 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: ucm.es. Thin bar: Education & Online Learning peer median.
Enable
44/100
Peers 75
Harden
65/100
Peers 54
Accelerate
58/100
Peers 57
Recover
100/100
Peers 13
Priority fixes for ucm.es
Ordered by impact and by how common each practice is among peers.
Priority 1 · Accelerate
HTTP/2 negotiated
Observed: The TLS handshake selected HTTP/1.1 instead of HTTP/2.
Why it matters: HTTP/2 sends many files over one connection, which speeds up pages with lots of images, styles and scripts.
What to do: Enable HTTP/2 on your CDN or server. Most CDNs do this by default.
80% of Education & Online Learning peers do this. Limit: Certificate and protocol were observed from one vantage point; CDNs can present different certificates by region.
Priority 2 · Enable
robots.txt published
Observed: No robots.txt file was returned at the site root.
What to do: Publish /robots.txt with any crawl rules you need and a Sitemap: line pointing to your XML sitemap.
82% of Education & Online Learning peers do this.
Guide: Robots.txt Guide: Control Crawling Without Hiding Mistakes
Priority 3 · Enable
XML sitemap discoverable
Observed: No sitemap was listed in robots.txt or found at /sitemap.xml.
What to do: Generate an XML sitemap of canonical URLs, reference it in robots.txt and submit it in Google Search Console.
65% of Education & Online Learning peers do this.
Guide: XML Sitemap Guide: Include Only URLs You Stand Behind
Priority 4 · Accelerate
Modern image formats in use
Observed: The homepage had 61 images and none used WebP or AVIF.
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.
32% of Education & Online Learning peers do this.
Guide: AVIF, WebP, JPEG, and PNG: Choose the Right Image Format
What ucm.es already does well
Practices fewer than half of Education & Online Learning peers use.
- Nameservers spread across providersNameservers spread across more than one operator.13% of peers
- CAA records limit who can issue certificatesCAA limits issuance to harica.gr.13% of peers
- HSTS kept for at least a yearHSTS with a 730-day max-age.34% of peers
What we saw
- Homepage checked
- https://www.ucm.es/
- Homepage response
- HTTP 200
- TLS
- TLSv1.3
- Certificate
- Hellenic Academic and Research Institutions CA, 365-day validity, expiring 2026-12-04
- DNS operators
- 2 self-run or other nameserver domains
- HSTS
- max-age 730 days
- DMARC policy
- p=quarantine
- Homepage HTML
- 67 KB, gzip
- Images on homepage
- 61 (svg 25, png 18, jpg 2)
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 16
- Certificate lifetime of 100 days or less
- DNSSEC signed
- security.txt published
- X-Content-Type-Options: nosniff
- Framing restricted
- Content Security Policy present
- Referrer-Policy set
- HTTP/2 negotiated
- HTTP/3 advertised
- Modern image formats in use
- robots.txt published
- XML sitemap discoverable
- Reachable over IPv6
- Canonical URL declared
- Structured data present
- Social preview image set
Observed 15
- HTTP requests move to HTTPS
- HSTS kept for at least a year
- TLS 1.3 negotiated
- Certificate has more than 14 days left
- CAA records limit who can issue certificates
- DMARC policy enforces quarantine or reject
- HTML compressed
- Static files cached for 30 days or more
- Offscreen images lazy-loaded
- No render-blocking scripts in <head>
- Meta description written
- Mobile viewport configured
- Page language declared
- At most one redirect to the homepage
- Nameservers spread across providers
Own ucm.es?
Re-run the checks after a change, or verify the site in a free workspace to save reports with history, compare against similar sites and competitors, and track a private action plan. What owners get.
Live status for this site: Status Is Down: ucm.es. This profile covers configuration only.