imserso.es

Readiness by lane

Green: imserso.es. Thin bar: Government Services peer median.

Priority fixes for imserso.es

Ordered by impact and by how common each practice is among peers.

1. Priority 1 · Accelerate

   No render-blocking scripts in <head>

   Observed: The homepage <head> loaded 9 external scripts without async or defer.

   Why it matters: A plain <script src> in the head stops the browser from showing anything until that file has downloaded and run.

   What to do: Add defer to scripts that need the DOM, async to independent ones such as analytics, or move them to the end of the body.

   39% of Government Services peers do this. Limit: Based on the homepage HTML delivered to an automated client; scripts that run later were not executed.

   Guide: Control Third-Party Scripts Before They Control Your Page

2. Priority 2 · Accelerate

   Modern image formats in use

   Observed: The homepage had 59 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.

   15% of Government Services peers do this.

   Guide: AVIF, WebP, JPEG, and PNG: Choose the Right Image Format

3. Priority 3 · Harden

   Content Security Policy present

   Observed: The homepage response did not include a Content-Security-Policy header.

   What to do: Start with Content-Security-Policy-Report-Only to see what would break, tighten the policy over a few weeks, then enforce it.

   41% of Government Services peers do this.

   Guide: Payment Security and PCI DSS: What Website Owners Need to Know

4. Priority 4 · Accelerate

   Offscreen images lazy-loaded

   Observed: The homepage had 59 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.

   36% of Government Services peers do this.

   Guide: Lazy Loading Without Broken Pages

What imserso.es already does well

Practices fewer than half of Government Services peers use.

• DNSSEC signedDNSSEC delegation (DS record) present.19% of peers
• Static files cached for 30 days or moreLong-lived caching on static files.30% of peers
• Canonical URL declaredCanonical link present.41% of peers

What we saw

Homepage checked

https://imserso.es/

Homepage response

HTTP 200, after 1 redirect

TLS

TLSv1.3, HTTP/2

Certificate

GlobalSign, 199-day validity, expiring 2027-01-11

DNS operators

1 self-run or other nameserver domain

HSTS

max-age 730 days, includeSubDomains

DMARC policy

p=quarantine

Homepage HTML

224 KB, gzip

Images on homepage

59 (svg 27, png 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

Compare with other Government Services sites

• belastingdienst.nl68
• iana.org68
• inps.it68
• nav.no68
• www.gov.br69

Government Services readiness benchmark