feiler.jp

Readiness by lane

Green: feiler.jp. Thin bar: E-Commerce & Marketplaces peer median.

Priority fixes for feiler.jp

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

1. Priority 1 · Harden

   HTTP requests move to HTTPS

   Observed: A request to http://feiler.jp/ was not redirected to HTTPS.

   Why it matters: Visitors who type the address or follow an old link start on unencrypted HTTP. A redirect moves them to the encrypted site before any cookies or form data are sent.

   What to do: Add a permanent (301 or 308) redirect from every http:// URL to the same https:// URL at your CDN, load balancer or web server.

   On Amazon CloudFront: Set the viewer protocol policy of each cache behaviour to Redirect HTTP to HTTPS.

   96% of E-Commerce & Marketplaces peers do this. Limit: Measured for the homepage only, from one location, at the time of the check.

   Guide: HTTPS and TLS Guide for Website Owners

2. Priority 2 · Enable

   Mobile viewport configured

   Observed: The homepage had no viewport meta tag, so phones may render it zoomed out.

   What to do: Add <meta name="viewport" content="width=device-width, initial-scale=1"> and check the layout on small screens.

   98% of E-Commerce & Marketplaces peers do this.

   Guide: Responsive Web Design Checklist for Real Devices

3. Priority 3 · Accelerate

   Static files cached for 30 days or more

   Observed: A same-site stylesheet or script was cacheable for no max-age, short of the 30-day benchmark.

   What to do: Give versioned (fingerprinted) CSS, JavaScript, fonts and images Cache-Control: public, max-age=31536000, immutable, and change the file name whenever the content changes.

   60% of E-Commerce & Marketplaces peers do this.

   Guide: Browser Caching Guide for Website Owners

4. Priority 4 · Accelerate

   Modern image formats in use

   Observed: The homepage had 111 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.

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

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

What feiler.jp already does well

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

• Referrer-Policy setReferrer-Policy present.20% of peers

What we saw

Homepage checked

https://feiler.jp/

Homepage response

HTTP 200, after 2 redirects

TLS

TLSv1.3, HTTP/2

Certificate

GlobalSign, 199-day validity, expiring 2026-12-24

CDN or edge

Amazon CloudFront

DNS operators

Amazon Route 53

DMARC policy

p=none

Homepage HTML

92 KB, gzip

Images on homepage

111 (png 72, gif 21, jpg 17)

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

• cortefiel.com38
• housefoods.jp38
• jm101.com38
• n-sport.net39
• tsite.jp40

E-Commerce & Marketplaces readiness benchmark