mantensama.jp

Readiness by lane

Green: mantensama.jp. Thin bar: Education & Online Learning peer median.

Priority fixes for mantensama.jp

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

1. Priority 1 · Enable

   Mobile viewport configured

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

   Why it matters: Without it, phones render the page at desktop width and shrink it, which makes text tiny and hard to use.

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

   97% 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: Responsive Web Design Checklist for Real Devices

2. Priority 2 · Accelerate

   HTTP/2 negotiated

   Observed: The TLS handshake selected HTTP/1.1 instead of HTTP/2.

   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.

   Guide: CDN Guide for Website Owners

3. Priority 3 · Harden

   TLS 1.3 negotiated

   Observed: The TLS connection negotiated TLSv1.2.

   What to do: Enable TLS 1.3 on your CDN or server. Keep TLS 1.2 available for older clients unless you have checked your audience.

   86% of Education & Online Learning peers do this.

   Guide: HTTPS and TLS Guide for Website Owners

4. Priority 4 · 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

What mantensama.jp 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
• No render-blocking scripts in <head>Head scripts load without blocking.42% of peers
• X-Content-Type-Options: nosniffnosniff header present.46% of peers

What we saw

Homepage checked

https://mantensama.jp/

Homepage response

HTTP 200

TLS

TLSv1.2

Certificate

DigiCert, 396-day validity, expiring 2027-03-27

DNS operators

3 self-run or other nameserver domains

Homepage HTML

1 KB, uncompressed

Images on homepage

1 (jpg 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 Education & Online Learning sites

• avsu.ru21
• ignou.ac.in24
• osmania.ac.in23
• sgpsistema.com27
• url.edu.gt24

Education & Online Learning readiness benchmark