walmart.co.cr

Readiness by lane

Green: walmart.co.cr. Thin bar: E-Commerce & Marketplaces peer median.

Priority fixes for walmart.co.cr

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

1. Priority 1 · Accelerate

   Modern image formats in use

   Observed: The homepage had 35 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.

   47% of E-Commerce & Marketplaces 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

2. Priority 2 · Accelerate

   No render-blocking scripts in <head>

   Observed: The homepage <head> loaded 1 external script without async or defer.

   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.

   44% of E-Commerce & Marketplaces peers do this.

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

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.

   48% of E-Commerce & Marketplaces peers do this.

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

4. 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 Amazon CloudFront: Select HTTP/3 in the distribution's supported HTTP versions.

   47% of E-Commerce & Marketplaces peers do this.

   Guide: CDN Guide for Website Owners

What walmart.co.cr already does well

Practices fewer than half of E-Commerce & Marketplaces peers use.

• CAA records limit who can issue certificatesCAA limits issuance to globalsign.com.16% of peers
• HSTS kept for at least a yearHSTS with a 730-day max-age covering subdomains.32% of peers
• DMARC policy enforces quarantine or rejectDMARC policy p=reject.39% of peers

What we saw

Homepage checked

https://www.walmart.co.cr/

Homepage response

HTTP 200

TLS

TLSv1.3, HTTP/2

Certificate

GlobalSign, 199-day validity, expiring 2027-05-10

CDN or edge

Akamai, Amazon CloudFront

DNS operators

Vercara UltraDNS

HSTS

max-age 730 days, includeSubDomains

DMARC policy

p=reject

Homepage HTML

1,421 KB, gzip

Images on homepage

35 (svg 34, png 1)

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 E-Commerce & Marketplaces sites

• tedi.com72
• thehalara.au72
• thehalara.fr72
• wayfair.co.uk72
• wayfair.com72

E-Commerce & Marketplaces readiness benchmark